BR112020010909B1 - USE OF A CALCIUM CARBONATE - Google Patents

Abstract

The present invention relates to the use of a surface-reacted calcium carbonate having a volumetric median particle size d50 of 0.1 to 90 µm as a skin appearance modifier in a cosmetic composition and/or skin care composition. skin.

Description

[001] The present invention relates to the use of a surface-reacted calcium carbonate having a volumetric median particle size d50 of 0.1 to 90 μm as a skin appearance modifier in a cosmetic composition and/or composition for skin care.

[002] A variety of cosmetic compositions are available for application to the skin of the face and/or body. Often such compositions are applied to modify the appearance of the skin, for example, for the purpose of hiding blemishes, hiding or reducing fine lines or wrinkles, minimizing pores or to alter and/or balance skin tone. Certain cosmetic compositions are also capable of controlling the shine of the skin to a certain extent by absorbing/adsorbing sebum, and thus providing the skin with a matte shine. In addition to these optical effects, it is often desirable for a cosmetic composition to provide the wearer with a natural, or ideally more pleasant, skin sensation. A natural or positive skin feel is often associated with a smooth, fresh and/or elastic skin feel and a skin surface that does not feel oily or dry.

[003] Various cosmetic compositions and/or skin care compositions are known in the prior art. By way of example, reference is made to US 6,461,626 B1 which relates to a wear-resistant topical composition having improved sensation. The patent describes discontinuous, substantially uniform films of a topical product having a defined abrasion resistance, a defined coverage value and a defined particle spacing. US 6,165,510 describes a cosmetic composition including an inorganic material in granular form which, under conditions of use of the cosmetic composition, fragments to a particle size of which less than 5% by weight is above 45 micrometers, as per measured by wet sieving analysis. Furthermore, US 6,004,584 relates to body moisture-absorbing powder compositions. The powder carrier that provides good skin-feel characteristics comprises skin-feel components selected from the group consisting of: starch, metal stearates, fatty acid derivatives, nylon, polyethylene, polytetrafluoroethylene, and platelet-shaped powders. EP 0,173,391 A2 relates to a skin cleansing composition comprising a synthetic soap or detergent and finely divided alkaline earth metal carbonates. Alkaline earth metal carbonates produce frictional forces that the user associates with a clean feeling.

[004] To provide a cosmetic composition and/or skin care composition with some of the aforementioned properties, synthetic or mineral fillers or powders such as talc, mica, silica or titanium dioxide are often added as opacifying or covering agents to the such compositions. However, for some cosmetic compositions and/or skin care compositions, the use of such powders or fillers may result in an artificial or unnatural appearance, especially if the composition contains large amounts of such powders or fillers. For other cosmetic compositions and/or skin care compositions the opacifying or covering effect may be low and skin lines may even be accentuated after their application. Furthermore, the application of such a cosmetic composition and/or skin care composition may be accompanied by an unusual or negative skin sensation that manifests itself, for example, in a dry or oily sensation and/or a tight skin sensation. or narrowed.

[005] As a result of the above report, there is still a demand for a skin appearance modifier for use in cosmetic compositions and/or skin care compositions. In particular, there is a demand for a skin appearance modifier for use in cosmetic compositions and/or skin care compositions so that wrinkles and/or skin imperfections are effectively concealed or concealed. Furthermore, a skin appearance modifier is required for use in cosmetic products that provide the skin with a natural and/or matte appearance. There is also a demand for a skin appearance modifier for use in cosmetic compositions and/or skin care compositions that provides the skin with a positive skin sensation, and especially with a smooth and/or fresh skin sensation.

[006] Consequently, an object of the present invention can be seen in the provision of a skin appearance modifier for use in a cosmetic composition and/or skin care composition, and especially for use in cosmetic compositions and/or skin care compositions that are used to hide or conceal wrinkles and/or skin imperfections. Another object of the present application is the provision of a skin appearance modifier for use in a cosmetic composition and/or skin care composition that provides the skin with a natural and/or matte appearance. Yet another object can be seen in the provision of a skin appearance modifier for use in a cosmetic composition and/or skin care composition that provides the skin with a positive skin feel, and especially with a smooth skin feel. and/or fresh.

[007] One or more of the aforementioned objectives is/are achieved by the present invention.

[008] According to one aspect of the present invention, there is provided the use of a surface-reacted calcium carbonate having a volumetric median particle size d50 of 0.1 to 90 μm as a skin appearance modifier in a cosmetic composition. and/or skin care composition. Surface-reacted calcium carbonate is a reaction product of ground natural calcium carbonate or calcium carbonate precipitated with carbon dioxide and one or more H3O+ ion donors, with carbon dioxide being formed in situ by treatment with donors. of H3O+ ion and/or is supplied from an external source.

[009] Advantageous modalities of using the invention are defined in the corresponding subclaims.

[0010] According to one embodiment of the present invention, the surface-reacted calcium carbonate has a volumetric median particle size d50 of 0.5 to 50 μm, preferably 1 to 40 μm, more preferably 1.2 to 30 μm, and most preferably 1.5 to 15 μm.

[0011] According to another embodiment of the present invention, the surface-reacted calcium carbonate has a specific surface area of 15 m2/g to 200 m2/g, preferably of 20 m2/g to 180 m2/g, and most preferably from 25 m2/g to 160 m2/g, measured using nitrogen and BET method.

[0012] According to yet another embodiment of the present invention, the ground natural calcium carbonate is selected from the group consisting of marble, chalk, limestone, and mixtures thereof, or the precipitated calcium carbonate is selected from the group consisting of calcium carbonates. calcium precipitates having an aragonitic, vateritic or calcitic crystalline form, and mixtures thereof.

[0013] According to an embodiment of the present invention, the at least one H3O+ ion donor is selected from the group consisting of hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, citric acid, oxalic acid, an acidic salt, acetic acid , formic acid, and mixture thereof, preferably the at least one H3O+ ion donor is selected from the group consisting of hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, oxalic acid, H2PO4-, being at least partially neutralized by a cation selected from Li+, Na+ and/or K+, HPO42-, being at least partially neutralized by a cation selected from Li+, Na+, K+, Mg2+, and/or Ca2+, and mixture thereof, more preferably the at least one ion donor H3O+ is selected from the group consisting of hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, oxalic acid, or mixtures thereof, and most preferably, the at least one H3O+ ion donor is phosphoric acid.

[0014] According to another embodiment of the present invention, the skin appearance modifier is a covering agent, a matting agent and/or a skin color modifier, and preferably a covering agent and/or a matting agent.

[0015] According to another embodiment of the present invention, the cosmetic composition and/or skin care composition has a pH value of < 8.5, preferably < 8.0, more preferably < 7.0, and with maximum preference from 4.0 to 7.0.

[0016] According to yet another embodiment of the present invention, surface-reacted calcium carbonate is present in the cosmetic composition and/or skin care composition in an amount of 0.1 to 50% by weight, based on the weight total composition, preferably from 0.5 to 20% by weight, more preferably from 1 to 10% by weight, and most preferably from 3 to 10% by weight.

[0017] According to an embodiment of the present invention, the cosmetic composition and/or skin care composition further comprises water and/or at least one oil, preferably the at least one oil is selected from the group consisting of oils vegetables and esters thereof, coconut alkanoic ester, plant extracts, animal fats, siloxanes, silicones, fatty acids and esters thereof, petrolatum, glycerides and pegylated derivatives thereof, and mixtures thereof.

[0018] According to another embodiment of the present invention, the cosmetic composition and/or skin care composition comprises at least one active agent that is adsorbed onto and/or absorbed into the surface of the surface-reacted calcium carbonate.

[0019] According to yet another embodiment of the present invention, the at least one active agent is selected from pharmaceutically active agents, biologically active agents, vitamins, disinfecting agents, preservatives, flavoring agents, surfactants, oils, fragrances, essential oils, and mixture of them.

[0020] According to an embodiment of the present invention, the composition further comprises at least one additive selected from the group consisting of whitening agents, thickeners, stabilizers, chelating agents, preservative agents, wetting agents, emulsifiers, emollients, fragrances, coloring agents , skin tanning compounds, antioxidants, minerals, pigments, UV-A and/or UV-B filter, and mixture thereof.

[0021] According to another embodiment of the present invention, the cosmetic composition and/or skin care composition is selected from an eye makeup product, a lip care product, a hand care product , a skin care product, or a combination product thereof.

[0022] According to yet another embodiment of the present invention, the cosmetic composition and/or skin care composition has a Brookfield viscosity in a range of 4,000 to 50,000, preferably 10,000 to 45,000, more preferably 15,000 to 40,000, even more preferably 20,000 to 40,000, and most preferably 25,000 to 40,000 mPa^s at 25°C.

[0023] According to one embodiment of the present invention, the calcium carbonate reacted on the surface also provides a change in skin sensation.

[0024] It should be understood that for the purposes of the present invention, the following terms have the following meanings:

[0025] A “cosmetic and/or skin care” composition, within the meaning of the present invention, refers to a composition that is applied to the skin. That is, a “cosmetic and/or skin care” composition does not encompass a composition that is typically orally ingested.

[0026] Natural “ground calcium carbonate” (GCC, ground calcium carbonate), within the meaning of the present invention, is a calcium carbonate obtained from natural sources, such as limestone, marble, or chalk, and processed through a treatment wet and/or dry such as grinding, sifting, and/or fractionation, for example, by a cyclone or classifier.

[0027] “Precipitated Calcium Carbonate” (PCC), within the meaning of the present invention, is a synthesized material, obtained by precipitation of the following reaction of carbon dioxide and lime in an aqueous, semi-dry or humid environment or by precipitation of a source of calcium and carbonate ions in water. PCC can be in vateritic, calcitic or aragonitic crystalline form. PCCs are described, for example, in EP 2,447,213 A1, EP 2,524,898 A1, EP 2,371,766 A1, EP 1,712,597 A1, EP 1,712,523 A1, or WO 2013/142473 A1.

[0028] The term “surface reacted”, within the meaning of the present application, should be used to indicate that a material has been subjected to a process comprising partial dissolution of said material under treatment with an H3O+ ion donor (e.g., by the use of acidic salts and/or water-soluble acids) in an aqueous environment followed by a crystallization process that may occur in the absence or presence of other crystallization additives.

[0029] A “H3O+ ion donor” in the context of the present invention is a Bronsted acid and/or an acidic salt, that is, a salt containing an acidic hydrogen.

[0030] The term “acid”, as used herein, refers to an acid within the meaning of the definition by Bronsted and Lowry (e.g., H2SO4, HSO4-).

[0031] The term “free acid” refers only to those acids that are in fully protonated form (e.g., H2SO4).

[0032] The “particle size” of particulate materials other than the surface-reacted calcium carbonate of the present invention is described by its particle size distribution dx. In the same, the dx value represents the relative diameter to which x% by weight of the particles have a diameter smaller than dx. This means that, for example, the d20 value is the particle size at which 20% by weight of all particles is smaller than that particle size. The d50 value is therefore the weight average particle size, i.e. 50% by weight of all particles are smaller than this particle size. For the purpose of the present invention, the particle size is specified as a weight median particle size d50(weight) unless otherwise indicated. Particle sizes were determined using a SedigraphTM 5100 instrument or SedigraphTM 5120 instrument from Micromeritics Instrument Corporation. The method and instrument are known to the skilled person and are commonly used to determine the particle size of fillers and pigments. Measurements were carried out in an aqueous solution of 0.1 wt% Na4P2O7.

[0033] The “particle size” of calcium carbonate reacted on the surface of the present invention is described as volumetric particle size distribution. A volumetric median particle size d50 was evaluated using a Malvern Mastersizer 2000 Laser Diffraction System. The d50 or d98 value, measured using a Malvern Mastersizer 2000 Laser Diffraction System, indicates a diameter value such that 50% or 98% by volume , respectively, of the particles have a diameter smaller than this value. The raw data obtained by measurement is analyzed using Mie theory, with a particle refractive index of 1.57 and an absorption index of 0.005.

[0034] The term “particulate”, within the meaning of the present application, refers to materials composed of a plurality of particles. Said plurality of particles can be defined, for example, by their particle size distribution. The term “particulate matter” may include granules, powders, grains, tablets, or crumbs.

[0035] The “specific surface area” (expressed in m2/g) of a material, as used throughout this document, can be determined by the Brunauer-Emmett-Teller (BET) method with nitrogen as the adsorbed gas and by using of a Micromeritics ASAP 2460 instrument. The method is well known to the skilled person and defined in ISO 9277:2010. Samples are conditioned at 100 °C under vacuum for a period of 309 min before measurement. The total surface area (in m2) of said material can be obtained by multiplying the specific surface area (in m2/g) and the mass (in g) of the material.

[0036] In the context of the present invention, the term “pore” is to be understood as describing the space that is found between and/or within the particles, that is, that is formed by the particles as they pack together under the nearest neighboring contact (interparticle pores), as in a powder or compact mass, and/or the empty space within porous particles (intraparticle pores), and which allows the passage of liquids under pressure when saturated by the liquid and/or supports absorption of wetting liquids from the surface.

[0037] The term “skin appearance modifier”, within the meaning of the present invention, refers to a cosmetic ingredient that is used to modify the appearance of the surface of the skin. For example, the appearance of the skin surface may be modified by covering the skin surface, matting the skin surface, and/or modifying the skin color. Therefore, the use of a surface-reacted calcium carbonate as described herein as a skin appearance modifier comprises the use of the surface-reacted calcium carbonate as described herein as a covering agent, matting agent and/or skin color modifier. skin. The term “skin appearance modifier” does not mean that it encompasses the modification of the skin’s biochemical properties such as elasticity.

[0038] The term “covering agent”, within the meaning of the present invention, refers to a cosmetic ingredient that is used to cover and/or modify the surface of the skin, for example, to hide skin imperfections and/or wrinkles. . The covering power, that is, the power of the covering agent to cover and/or to opacify the surface of the skin, can be measured by spreading a cosmetic composition and/or skin care composition comprising the covering agent onto a contrast paper and subsequently measuring the Rx, Ry, Rz color values of the composition using a colorimeter. By comparing the color values of the cosmetic composition and that of the contrast paper, the contrast is calculated. Contrast directly refers to hiding power. Contrast ratio values are determined according to ISO 2814 at a spreading rate of approximately 20 m2/l. The contrast ratio is calculated as described by the equation below: with Ryblack and Rywhite being obtained by measuring color values.

[0039] The expression “matting agent”, within the meaning of the present invention, refers to a cosmetic ingredient that is used to decrease the luster and/or shine of the skin's surface, for example, by sebum absorption and/or regulation. of sebum production. The matting power, that is, the power of the matting agent to decrease the luster and/or shine of the skin surface, can be measured by using, for example, a “Skin-Glossymeter® GL200” probe as described in the examples.

[0040] The “skin feel” of a cosmetic composition and/or skin care composition refers to the sensation of the skin that is perceived by the applicant during application of the cosmetic composition and/or skin care composition onto the surface of the skin. The term also means that it encompasses the sensation of the skin that is perceived by the applicant upon application immediately after applying the cosmetic composition and/or skin care composition to the surface of the skin, i.e., within 5 minutes after applying the composition. cosmetic and/or skin care composition.

[0041] The expression “modification of skin sensation”, within the meaning of the present invention, refers to the modification of skin sensation as described above after application of the cosmetic composition and/or skin care composition. Modification of skin sensation refers, for example, to reduced dry time of the composition when applied to the skin or a reduction in the greasiness of the composition when applied to the skin. Furthermore, the modification of skin sensation may also refer to the fluidity, spreadability, homogeneity, stickiness and/or resistance of the composition when applied to the skin.

[0042] Unless otherwise specified, the term “drying” refers to a process according to which at least a portion of water is removed from a material to be dried so that a weight is reached. constant of the “dried” material obtained at 120 °C. Furthermore, a “dried” or “dry” material may be defined by its total moisture content which, unless otherwise specified, is less than or equal to 1.0% by weight, preferably less than or equal to 0.5% by weight, more preferably less than or equal to 0.2% by weight, and most preferably between 0.03 and 0.07% by weight, based on the total weight of the dried material.

[0043] For the purpose of the present application, “water insoluble” materials are defined as those which, when mixed with 100 mL of deionized water and filtered at 20°C to recover the liquid filtrate, yield less than or equal to 0. 1 g of solid material recovered after evaporation at 95 to 100°C of 100 g of said liquid filtrate. “Water-soluble” materials are defined as materials that result in the recovery of more than 0.1 g of solid material after evaporation at 95 to 100 ° C of 100 g of said liquid filtrate. For the purpose of evaluating whether a material is an insoluble or soluble material within the meaning of the present invention, the sample size is greater than 0.1 g, preferably 0.5 g or more.

[0044] A “suspension” or “fluid paste”, within the meaning of the present invention, comprises undissolved solids and water, and optionally, still other additives, and usually contains large amounts of solids and, therefore, is more viscous and can be of higher density than that of the liquid from which it is formed.

[0045] Where an indefinite or definite article is used when referring to a noun in the singular, e.g., “a”, “an”, “the” or “a”, it includes a plural of that noun unless something else is specifically stated.

[0046] Where the term “comprising” is used in the present description and in the claims, it does not exclude other elements. For the purposes of the present invention, the term “consisting of” is considered as a preferred embodiment of the term “comprising”. If hereinafter a group is defined to comprise at least a certain number of embodiments, it should also be understood to describe a group, which preferably consists only of these embodiments.

[0047] Terms such as “obtainable” or “definable” and “obtained” or “defined” are used interchangeably. This, for example, means that, unless the context clearly dictates otherwise, the term “obtained” does not mean that it indicates that, for example, an embodiment needs to be obtained, for example, by the sequence of steps following the term “ obtained”, although such a limited understanding is always included by the terms “obtained” or “defined” as a preferred embodiment.

[0048] Whenever the terms “including” or “having” are used, these terms are meant to be equivalent to “comprising” as previously defined.

[0049] Next, preferred embodiments of the composition of the invention will be demonstrated in more detail.

Surface reacted calcium carbonate

[0050] The present invention relates to the use of a surface-reacted calcium carbonate having a volumetric median particle size d50 of 0.1 to 90 μm as a skin appearance modifier in a cosmetic composition and/or composition for skin care, where the calcium carbonate reacted on the surface is a reaction product of ground natural calcium carbonate or calcium carbonate precipitated with carbon dioxide and one or more H3O+ ion donors, with carbon dioxide being formed in situ by treatment with H3O+ ion donors and/or is supplied from an external source.

[0051] In a preferred embodiment of the invention, surface-reacted calcium carbonate is obtained by a process comprising the steps of: (a) providing a suspension of natural or precipitated calcium carbonate, (b) adding at least one acid having a pKa value of 0 or less at 20°C or having a pKa value of 0 to 2.5 at 20°C to the suspension from step a), and (c) treating the suspension from step (a) with carbon dioxide carbon before, during or after step (b). According to another embodiment, surface-reacted calcium carbonate is obtained by a process comprising the steps of: (A) providing a natural or precipitated calcium carbonate, (B) providing at least one water-soluble acid, (C) provide gaseous CO2, (D) place said natural calcium carbonate or precipitate from step (A) in contact with at least one acid from step (B) and with CO2 from step (C), distinguished by: (i) the at least one acid from step B) has a pKa of greater than 2.5 and less than or equal to 7 at 20°C, associated with the ionization of its first available hydrogen, and a corresponding anion is formed upon loss of this first available hydrogen capable of forming a water-soluble calcium solution, and (ii) after placing the at least one acid in contact with the natural or precipitated calcium carbonate, at least one water-soluble salt is additionally provided, which in the case of a hydrogen-containing salt has a pKa of greater than 7 at 20°C, associated with the ionization of the first available hydrogen, and whose salt anion is capable of forming water-insoluble calcium salts.

[0052] Ground “natural calcium carbonate” (GCC) is preferably selected from minerals containing calcium carbonate selected from the group comprising marble, chalk, limestone and mixtures thereof. Ground natural calcium carbonate may also comprise naturally occurring components such as magnesium carbonate, aluminum silicate, etc.

[0053] In general, grinding of ground natural calcium carbonate can be a dry or wet grinding step and can be carried out with any conventional grinding device, for example, under conditions such that predominantly result from impacts with a body secondary, that is, in one or more of: a ball mill, a rod mill, a vibratory mill, a cylinder crusher, a centrifugal impact mill, a vertical ball mill, an attrition mill, a pins, a hammer mill, a pulverizer, a chopper, a pulper, a knife cutter, or other such equipment known to the skilled man. In case the calcium carbonate-containing mineral material comprises a wet-milled calcium carbonate-containing mineral material, the grinding step may be carried out under conditions such that autogenous grinding occurs and/or by horizontal ball grinding, and/or other such processes known to skilled man. The wet-processed ground calcium carbonate-containing mineral material thus obtained can be washed and dewatered by well-known processes, for example, by flocculation, filtration or forced evaporation before drying. The subsequent drying step (if necessary) can be carried out in a single step such as spray drying, or in at least two steps. It is also common for such a mineral material to be subjected to a beneficiation step (such as a flotation, bleaching or magnetic separation step) to remove impurities.

[0054] “Precipitated calcium carbonate” (PCC), within the meaning of the present invention, is a material synthesized, generally by precipitation after the reaction of carbon dioxide and calcium hydroxide in an aqueous environment or by precipitation of calcium ions and carbonate, for example CaCl2 and Na2CO3, from the solution. Other possible ways to produce PCC are the soda lime process, or the Solvay process in which PCC is a byproduct of ammonia production. Precipitated calcium carbonate exists in three primary crystal forms: calcite, aragonite and vaterite, and there are many different polymorphs (crystal habits) for each of these crystal forms. Calcite has a trigonal structure with typical crystal habits such as scalenohedral (S-PCC), rhombohedral (R-PCC), hexagonal prismatic, pinacoid, colloidal (C-PCC), cubic, and prismatic (P-PCC). Aragonite is an orthorhombic structure with typical crystal habits of twinned hexagonal prismatic crystals, and also, a diverse assortment of thin elongated prismatic crystals, curved laminates, steep pyramidal, chiseled, dendritic (branched habit), and coralform or vermiform crystals. Vaterite belongs to the hexagonal crystal system. The obtained PCC slurry can be mechanically dewatered and dried.

[0055] According to an embodiment of the present invention, the precipitated calcium carbonate is precipitated calcium carbonate, preferably comprising aragonitic, vateritic or calcitic mineralogical crystalline forms, or mixtures thereof.

[0056] Precipitated calcium carbonate can be milled before treatment with carbon dioxide and at least one H3O+ ion donor by the same means used for milling natural calcium carbonate as described above.

[0057] According to an embodiment of the present invention, the ground natural calcium carbonate or precipitated calcium carbonate is in the form of particles having a weight median particle size d50 of 0.05 to 10.0 μm, preferably of 0. 2 to 5.0 μm, and most preferably 0.4 to 3.0 μm. According to another embodiment of the present invention, the ground natural calcium carbonate or precipitated calcium carbonate is in the form of particles having an upper cutoff weight particle size d98 of 0.15 to 30 μm, preferably of 0.6 to 15 μm, more preferably 1.2 to 10 μm, most preferably 1.5 to 4 μm, especially 1.6 μm.

[0058] Ground natural calcium carbonate and/or precipitated calcium carbonate can be used dry or suspended in water. Preferably, a corresponding slurry has a content of ground natural calcium carbonate or precipitated calcium carbonate within the range of 1% by weight to 90% by weight, more preferably from 3% by weight to 60% by weight, even more preferably from 5% by weight to 40% by weight, and most preferably from 0% by weight to 25% by weight based on the total weight of the slurry.

[0059] The one or more H3O+ ion donors used for the preparation of surface-reacted calcium can be any strong acid, semi-strong acid, or weak acid, or mixtures thereof, which generate H3O+ ions under the preparation conditions. According to the present invention, the at least one H3O+ ion donor can also be an acidic salt, which generates H3O+ ions under the preparation conditions.

[0060] According to one embodiment, the at least one H3O+ ion donor is a strong acid having a pKa of 0 or less at 20°C.

[0061] According to another embodiment, the at least one H3O+ ion donor is a semi-strong acid having a pKa value of 0 to 2.5 at 20°C. If the pKa at 20°C is 0 or less, the acid is preferably selected from sulfuric acid, hydrochloric acid, or mixtures thereof. If the pKa at 20°C is 0 to 2.5, the H3O+ ion donor is preferably selected from H2SO3, H3PO4, oxalic acid, or mixtures thereof. The at least one H3O+ ion donor may also be an acidic salt, for example, HSO4- or H2PO4-, being at least partially neutralized by a corresponding cation such as Li+, Na+ or K+, or HPO42-, being at least partially neutralized by a corresponding cation such as Li+, Na+, K+, Mg2+ or Ca2+. The at least one H3O+ ion donor may also be a mixture of one or more acids and one or more acidic salts.

[0062] According to yet another embodiment, the at least one H3O+ ion donor is a weak acid having a pKa value of greater than 2.5 and less than or equal to 7, when measured at 20°C, associated with the ionization of the first available hydrogen, and having a corresponding anion, which is capable of forming water-soluble calcium salts. Subsequently, there is additionally provided at least one water-soluble salt, which in the case of a hydrogen-containing salt, has a pKa of greater than 7, when measured at 20°C, associated with the ionization of the first available hydrogen, and whose anion of the salt is capable of forming water-insoluble calcium salts. According to the preferred embodiment, the weak acid has a pKa value of greater than 2.5 to 5 at 20°C, and more preferably the weak acid is selected from the group consisting of acetic acid, formic acid, propanoic acid, and mixture of them. Exemplary cations of said water-soluble salt are selected from the group consisting of potassium, sodium, lithium and mixtures thereof. In a more preferred embodiment, said cation is sodium or potassium. Exemplary anions of said water-soluble salt are selected from the group consisting of phosphate, dihydrogen phosphate, monohydrogen phosphate, oxalate, silicate, mixtures thereof and hydrates thereof. In a more preferred embodiment, said anion is selected from the group consisting of phosphate, dihydrogen phosphate, monohydrogen phosphate, mixtures thereof and hydrates thereof. In a most preferred embodiment, said anion is selected from the group consisting of dihydrogen phosphate, monohydrogen phosphate, mixtures thereof and hydrates thereof. Addition of water-soluble salt can be done drip or in one step. In the case of addition in drip mode, this addition preferably occurs within a time period of 10 minutes. It is more preferred to add said salt in one step.

[0063] According to an embodiment of the present invention, the at least one H3O+ ion donor is selected from the group consisting of hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, citric acid, oxalic acid, acetic acid, formic acid, and mixing them. Preferably the at least one H3O+ ion donor is selected from the group consisting of hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, oxalic acid, H2PO4-, being at least partially neutralized by a corresponding cation such as Li+, Na+ or K+, HPO42 -, being at least partially neutralized by a corresponding cation such as Li+, Na+, K+, Mg2+, or Ca2+ and mixture thereof, more preferably the at least one acid is selected from the group consisting of hydrochloric acid, sulfuric acid, sulfurous acid, acid phosphoric acid, oxalic acid, or mixtures thereof, and most preferably, the at least one H3O+ ion donor is phosphoric acid.

[0064] The one or more H3O+ ion donors can be added to the suspension as a concentrated solution or a more dilute solution. Preferably, the ratio between moles of H3O+ ion donor and moles of natural or precipitated calcium carbonate is 0.01 to 4, more preferably 0.02 to 2, even more preferably 0.05 to 1 and with maximum preference from 0.1 to 0.58.

[0065] As an alternative, it is also possible to add the H3O+ ion donor to the water before the natural calcium carbonate or precipitate is suspended.

[0066] In a next step, the ground natural calcium carbonate or precipitated calcium carbonate is treated with carbon dioxide. If a strong acid such as sulfuric acid or hydrochloric acid is used for H3O+ ion donor treatment of ground natural calcium carbonate or precipitated calcium carbonate, carbon dioxide is automatically formed. Alternatively or additionally, carbon dioxide may be supplied from an external source.

[0067] Treatment with H3O+ ion donor and carbon dioxide treatment can be carried out simultaneously, which is the case when a strong acid or a semi-strong acid is used. It is also possible to first carry out treatment with an H3O+ ion donor, for example, with a semi-strong acid having a pKa value in the range of 0 to 2.5 at 20°C, with carbon dioxide being formed in situ, and therefore, carbon dioxide treatment will automatically be performed simultaneously with the H3O+ ion donor treatment, followed by additional carbon dioxide treatment supplied from an external source.

[0068] Preferably, the concentration of gaseous carbon dioxide in the suspension is, in terms of volume, such that the ratio (suspension volume):(gaseous CO2 volume) is 1:0.05 to 1:20, further more preferably from 1:0.05 to 1:5.

[0069] In a preferred embodiment, the H3O+ ion donor treatment step and/or the carbon dioxide treatment step are repeated at least once, more preferably several times. According to one embodiment, the at least one H3O+ ion donor is added over a period of time of at least about 5 min, typically from about 5 to about 30 min. Alternatively, the at least one H3O+ ion donor is added over a period of time of about 30 min, preferably about 45 min, and sometimes about 1 h or more.

[0070] Subsequent to treatment with H3O+ ion donor and treatment with carbon dioxide, the pH of the aqueous suspension, measured at 20°C, naturally reaches a value greater than 6.0, preferably greater than 6.5, more preferably greater than 7.0, even more preferably greater than 7.5, thereby preparing the surface-reacted natural or precipitated calcium carbonate as an aqueous suspension having a pH of greater than 6.0, preferably greater than 6.5 , more preferably greater than 7.0, even more preferably greater than 7.5.

[0071] It is recognized that H3O+ ion donor treatment and carbon dioxide treatment can be carried out over a wide range of temperatures. Preferably, the H3O+ ion donor treatment and carbon dioxide treatment can be carried out at room temperature or at elevated temperature. For example, if the H3O+ ion donor treatment and the carbon dioxide treatment are carried out at elevated temperature, the treatment is preferably in a range of 30 to 90 °C, more preferably of 40 to 80 °C and with the maximum preferably 50 to 80 °C, such as 60 to 80 °C.

[0072] Additional details on the preparation of surface-reacted natural calcium carbonate are described in WO 00/39222 A1, WO 2004/083316 A1, WO 2005/121257 A2, WO 2009/074492 A1, EP 2,264,108 A1, EP 2,264,109 A1 and US 2004/0020410 A1, the content of these references being included in the present application

[0073] Similarly, precipitated calcium carbonate reacted on the surface is obtained. As can be obtained in detail from WO 2009/074492 A1, the surface-reacted precipitated calcium carbonate is obtained by placing the precipitated calcium carbonate in contact with H3O+ ions and with anions that are solubilized in an aqueous medium and which are capable of forming water-insoluble calcium salts, in an aqueous medium to form a slurry of surface-reacted precipitated calcium carbonate, said surface-reacted precipitated calcium carbonate comprising an insoluble calcium salt, at least partially crystalline form of said anion formed on the surface of at least part of the precipitated calcium carbonate.

[0074] Said solubilized calcium ions correspond to an excess of solubilized calcium ions relative to the naturally solubilized calcium ions generated after the dissolution of calcium carbonate precipitated by H3O+ ions, with H3O+ ions being provided only in the form of a counterion to the anion, that is, via the addition of the anion in the form of an acid or a non-calcium acidic salt, and in the absence of any other calcium ion or other source generating calcium ions.

[0075] Said excessive solubilized calcium ions are preferably provided by the addition of a soluble acidic or neutral calcium salt, or by the addition of an acid or a non-calcium acidic salt that generates in situ an acidic or neutral calcium salt soluble.

[0076] Said H3O+ ions can be provided by the addition of an acid or an acidic salt of said anion, or by the addition of an acid or an acidic salt that simultaneously serves to provide all or part of said excessive solubilized calcium ions .

[0077] In another preferred embodiment of the preparation of surface-reacted ground natural calcium carbonate or surface-reacted precipitated calcium carbonate, the ground natural calcium carbonate or precipitated calcium carbonate is reacted with the acid and/or with carbon dioxide in the presence of a compound selected from the group consisting of silicate, silica, aluminum hydroxide, alkaline earth aluminate such as sodium or potassium aluminate [sic], magnesium oxide, or mixtures thereof. Preferably, the at least one silicate is selected from an aluminum silicate, a calcium silicate, or an alkaline earth metal silicate. These components can be added to an aqueous suspension comprising ground natural calcium carbonate or calcium carbonate precipitated prior to addition of the acid and/or carbon dioxide.

[0078] Alternatively, the silicate and/or silica and/or aluminum hydroxide and/or alkaline earth aluminate and/or magnesium oxide component(s) can be added to the aqueous suspension of carbonate natural or precipitated calcium when the reaction of natural or precipitated calcium carbonate with an acid and carbon dioxide has already started. Additional details on the preparation of natural calcium carbonate or surface-reacted precipitate in the presence of at least one silicate and/or silica component(s) and/or aluminum hydroxide and/or alkaline earth aluminate are described in WO 2004/083316 A1, the contents of this reference being included in the present application.

[0079] The calcium carbonate reacted on the surface can be kept in suspension, optionally additionally stabilized by a dispersant. Conventional dispersants known to the skilled person may be used. A preferred dispersant is comprised of polyacrylic acids and/or carboxymethylcelluloses.

[0080] Alternatively, the aqueous suspension described above can be dried, thus obtaining the surface-reacted ground natural calcium carbonate, solid (i.e., dry or containing little water as it is not in a fluid form) or the carbonate calcium precipitate reacted on the surface, solid (i.e., dry or containing little water so that it is not in a fluid form), in the form of granules or a powder.

[0081] The calcium carbonate reacted on the surface can have different particle shapes, such as, for example, the shape of roses, golf balls and/or bran.

[0082] According to one embodiment, the surface-reacted calcium carbonate has a specific surface area of 15 m2/g to 200 m2/g, preferably 20 m2/g to 180 m2/g, and most preferably 25 m2 /g to 160 m2/g, measured using nitrogen and BET method. BET specific surface area within the meaning of the present invention is defined as the surface area of the particles divided by the mass of the particles. As used herein, specific surface area is measured by adsorption using the BET isotherm (ISO 9277:2010) and is specified in m2/g.

[0083] It is a requirement of the present invention that the surface-reacted calcium carbonate has a volumetric median particle size d50 of 0.1 to 90 μm. According to one embodiment, the surface-reacted calcium carbonate has a volumetric median particle size d50 of 0.1 to 75 μm, preferably of 0.5 to 50 μm, more preferably of 1 to 40 μm, even more preferably of 1.2 to 30 μm, and most preferably 1.5 to 15 μm.

[0084] It may be further preferred that the surface-reacted calcium carbonate particles have an upper cutoff volumetric particle size d98 of 2 to 150 μm, preferably 4 to 100 μm, more preferably 6 to 80 μm, even more preferably from 8 to 60 μm, and most preferably from 8 to 30 μm.

[0085] The value dx represents the relative diameter to which x% of particles have diameters smaller than dx. This means that the d98 value is the particle size at which 98% of all particles are smallest. The d98 value is also referred to as “upper cutoff”. The dx values can be presented as a percentage by volume or by weight. The d50(weight) value is therefore the weight median particle size, that is, 50% by weight of all grains are smaller than this particle size, and the d50(vol) value is the volumetric median size of particle, that is, 50% by volume of all grains are smaller than this particle size.

[0086] The volumetric median grain diameter d50 was evaluated using a Malvern Mastersizer 2000 Laser Diffraction System. The d50 or d98 value, measured using a Malvern Mastersizer 2000 Laser Diffraction System, indicates a diameter value such that 50% or 98 % by volume, respectively, of the particles have a diameter smaller than this value. The raw data obtained by measurement is analyzed using Mie theory, with a particle refractive index of 1.57 and an absorption index of 0.005.

[0087] The weight median grain diameter is determined by the sedimentation method, which is an analysis of sedimentation behavior in a gravimetric field. The measurement is performed with a SedigraphTM 5100 or 5120, from Micromeritics Instrument Corporation. The method and instruments are known to the skilled person and are commonly used to determine the grain size of fillers and pigments. The measurement is carried out in an aqueous solution of 0.1% by weight of Na4P2O7. Samples were dispersed using a high-speed shaker and sonicated.

[0088] The processes and instruments are known to the skilled person and are commonly used to determine the grain size of fillers and pigments.

[0089] Specific pore volume is measured using a mercury intrusion porosimetry measurement using a Micromeritics Autopore V 9620 mercury porosimeter having a maximum applied mercury pressure of 414 MPa (60,000 psi), equivalent to a throat diameter Laplace measurement of 0.004 μm (~4 nm). The equilibrium time used in each pressure step is 20 seconds. The sample material is sealed in a 5 cm3 chamber powder penetrameter for analysis. Data are corrected for mercury compression, expansion in the penetrometer, and compression of sample material using the Pore-Comp computer program (Gane, P.A.C., Kettle, J.P., Matthews, G.P., and Ridgway, C.J., “Void Space Structure of Compressible Polymer Spheres and Consolidated Calcium Carbonate Paper-Coating Formulations”, Industrial and Engineering Chemistry Research, 35(5), 1996, pp. 1753-1764).

[0090] The total pore volume seen in the cumulative intrusion data can be separated into two regions with the intrusion data from 214 μm down to about 1-4 μm showing coarse packing of the sample between any strongly contributing agglomerated structures . Below these diameters is the fine interparticle packing of the particles themselves. If they are also intraparticle pores, then this region appears to be bimodal, and considering the specific volume of pores intruded by mercury into the pores thinner than the modal inflection point, that is, thinner than the point bimodal inflection, the specific intraparticle pore volume is defined. The sum of these three regions gives the overall total pore volume of the powder, but depends heavily on the compaction/sedimentation of the original powder sample at the coarse-pore end of the distribution.

[0091] Considering the first derivative of the cumulative intrusion curve, pore size distributions based on the equivalent Laplace diameter are described, inevitably including pore shielding. The differential curves clearly show the coarse agglomerated pore structure region, the interparticle pore region, and the intraparticle pore region, if present. Knowing the range of intraparticle pore diameters, it is possible to subtract the remaining volume of interparticle and intercluster pores from the total pore volume to give the desired pore volume of the internal pores alone in terms of the pore volume per unit mass (specific volume of pores). The same subtraction principle obviously applies for isolating any of the other pore size regions of interest.

[0092] Preferably, the surface-reacted calcium carbonate has a specific intraparticle intruded pore volume in the range of 0.1 to 2.3 cm3/g, more preferably 0.2 to 2.0 cm3/g, especially preferably from 0.4 to 1.8 cm3/g and most preferably from 0.6 to 1.6 cm3/g, calculated from measurement by mercury porosimetry.

[0093] The intraparticle pore size of the surface-reacted calcium carbonate preferably is in a range of 0.004 to 1.6 μm, more preferably in a range of between 0.005 and 1.3 μm, especially preferably 0.006 and 1.15 μm and with maximum preference of 0.007 and 1.0 μm, for example, 0.004 and 0.16 μm determined by mercury porosimetry measurement.

[0094] According to an exemplary embodiment, the surface-reacted calcium carbonate has a volumetric median particle size d50 of 1.5 to 15 μm, preferably 4 to 6 μm; a specific surface area of 30 to 140 m2/g, preferably 60 to 100 m2/g, measured using nitrogen and BET method; and a specific intraparticle intruded pore volume of 0.2 to 2.0 cm3/g, preferably 0.6 to 1.6 cm3/g, calculated from measurement by mercury porosimetry.

[0095] Due to the intraporous and interporous structure of surface-reacted calcium carbonate, it can be a superior agent for distributing materials previously adsorbed and/or absorbed over time relative to materials having similar specific surface areas. Therefore, in general, any agent that fits within the intraparticle and/or interparticle pores of the surface-reacted calcium carbonate is suitable for transport by the surface-reacted calcium carbonate according to the invention. For example, active agents such as those selected from the group comprising pharmaceutically active agents, biologically active agents, disinfecting agents, preservatives, flavoring agents, surfactants, oils, fragrances, essential oils, and mixtures thereof may be used. According to one embodiment, at least one active agent is associated with the surface-reacted calcium carbonate.

[0096] According to one embodiment of the present invention, the surface-reacted calcium carbonate comprises a water-insoluble, at least partially crystalline calcium salt of an anion of the at least one acid, which is formed on the surface of the carbonate ground natural calcium or precipitated calcium carbonate. According to one embodiment, the water-insoluble, at least partially crystalline salt of an anion of the at least one acid converts the surface of the ground natural calcium carbonate or precipitated calcium carbonate at least partially, preferably completely. Depending on the at least one acid used, the anion can be sulfate, sulfite, phosphate, citrate, oxalate, acetate, formate and/or chloride.

[0097] For example, the use of phosphoric acid, H2PO4- or HPO42- as the H3O+ ion donor can result in the formation of hydroxylapatite. Therefore, in a preferred embodiment, the at least one water-insoluble calcium salt is hydroxylapatite.

[0098] According to one embodiment, the at least one water-insoluble calcium salt is hydroxylapatite, with the surface-reacted calcium carbonate providing a ratio of hydroxylapatite to calcite, aragonite and/or vaterite, preferably to calcite, in the range from 1:99 to 99:1 by weight. Preferably, the surface-reacted calcium carbonate may provide a ratio of hydroxylapatite to calcite, aragonite and/or vaterite, preferably to calcite, in the range of 1:9 to 9:1, preferably 1:7 to 8:1, more preferably from 1:5 to 7:1 and most preferably from 1:4 to 7:1 by weight.

[0099] In a similar manner, the use of other H3O+ ion donors may result in the formation of corresponding water-insoluble calcium salts other than calcium carbonate on at least part of the surface of the surface-reacted calcium carbonate. In one embodiment, the at least one water-insoluble calcium salt is therefore selected from the group consisting of calcium octaphosphate, hydroxylapatite, chloroapatite, fluorapatite, carbonate-apatite and mixtures thereof, wherein the surface-reacted calcium carbonate shows a ratio of the at least one water-insoluble calcium salt to calcite, aragonite and/or vaterite, preferably to calcite, in the range of 1:99 to 99:1, preferably of 1:9 to 9:1, more preferably of 1 :7 to 8:1, even more preferably from 1:5 to 7:1 and most preferably from 1:4 to 7:1 by weight.

[00100] According to one embodiment the surface-reacted calcium carbonate comprises: (i) a specific surface area of 15 to 200 m2/g measured using nitrogen and BET method in accordance with ISO 9277:2010, and (ii) a specific intraparticle intruded pore volume in the range of 0.1 to 2.3 cm3/g calculated from mercury porosimetry measurement.

[00101] In one embodiment of the present invention, the surface-reacted calcium carbonate, as described herein, is provided in the form of granules. “Granules” within the meaning of the present invention are agglomerates of surface-reacted calcium carbonate and have a particle size of 20 to 300 μm. This means that granules having a particle size of 20 to 300 μm comprise primary particles of surface-reacted calcium carbonate having a volumetric median particle size d50 of 0.1 to 90 μm.

The cosmetic composition and/or skin care composition

[00102] The invention relates to the use of surface-reacted calcium carbonate, as defined herein, as a skin appearance modifier in a cosmetic composition and/or skin care composition.

[00103] It has surprisingly been found by the inventors that the use of surface-reacted calcium carbonate, as defined herein, in a cosmetic composition and/or skin care composition, results in an improved modification of the appearance of the skin, of such compositions. , compared to using another skin appearance modifier.

[00104] For example, it has been found that the use of surface-reacted calcium carbonate, as defined herein, in a cosmetic composition and/or skin care composition results in an improved covering power of such composition compared to the use of other coating agents, and especially compared to ground calcium carbonate. Furthermore, the inventors have found that a cosmetic composition and/or skin care composition comprising a surface-reacted calcium carbonate in accordance with the present invention is more effective in covering the surface of the skin than a similar composition not containing the calcium carbonate reacted on the surface. Based on this, the cosmetic composition and/or skin care composition is more effective in concealing wrinkles or hiding skin imperfections.

[00105] It has also been found that the use of surface-reacted calcium carbonate, as defined herein, in a cosmetic composition and/or skin care composition results in decreased luster or shine of the skin surface, and therefore has the effect of a matting agent. Without wishing to be bound by theory, the decreased luster or shine of the skin's surface could be due to a decrease in the sebum rate. Decreased sebum rate is another surprising effect of using surface-reacted calcium carbonate, as defined herein, in a cosmetic composition and/or skin care composition.

[00106] Furthermore, the inventors have found that the surface-reacted calcium carbonate results in an improved change in skin appearance compared to an improved change in skin sensation.

[00107] According to one embodiment, the skin appearance modifier is a covering agent, a matting agent and/or a skin color modifier, and preferably a covering agent and/or a matting agent. In one embodiment, the skin appearance modifier is a covering agent and/or a matting agent and further provides skin sensation modification.

[00108] It is recognized that the amount of surface-reacted calcium carbonate in the cosmetic composition and/or skin care composition may vary over a wide range and may depend on the cosmetic composition and/or skin care composition to be prepared and/or the manufacturer's needs and/or legal requirements. For example, on the one hand, in case a cosmetic composition and/or skin care composition is prepared in the form of, for example, a paste or an emulsion, the amount of the reacted calcium carbonate on the surface may be less than 50 % by weight, based on the total weight of the cosmetic composition and/or skin care composition. On the other hand, in case a cosmetic composition and/or skin care composition is prepared in the form of, for example, a powder, the amount of reacted calcium carbonate on the surface may be greater than 50% by weight, based on the total weight of the cosmetic composition and/or skin care composition.

[00109] In general, surface-reacted calcium carbonate may therefore be present in the cosmetic composition and/or skin care composition in an amount of 0.1 to 90% by weight, based on the total weight of the composition. cosmetic and/or skin care composition, and preferably from 0.5 to 80% by weight.

[00110] According to an embodiment of the present invention, surface-reacted calcium carbonate is present in the cosmetic composition and/or skin care composition in an amount of 0.1 to 50% by weight, based on the total weight. of the cosmetic composition and/or skin care composition, preferably from 0.5 to 20% by weight, more preferably from 1 to 10% by weight, and most preferably from 3 to 10% by weight.

[00111] In an alternative embodiment of the present invention, surface-reacted calcium carbonate is present in the cosmetic composition and/or skin care composition in an amount of 50 to 90% by weight, based on the total weight of the cosmetic composition. and/or skin care composition, and preferably 60 to 80% by weight.

[00112] In case the cosmetic composition and/or skin care composition is prepared in the form of a paste or an emulsion, that is, not in the form of a powder, the pH value of the composition can be adjusted to any appropriate value for a cosmetic composition and/or skin care composition. Therefore, the cosmetic composition and/or skin care composition as described herein is not limited to a specific pH value.

[00113] The inventors have surprisingly found that the pH value of the cosmetic composition comprising surface-reacted calcium carbonate according to the invention can be adjusted to a value of < 7.5, and can even be adjusted to a pH value from 4.0 to 7.0 without showing a negative influence on the stability of calcium carbonate particles. Usually cosmetic compositions containing, for example, ground calcium carbonate tend to become unstable when the pH value is adjusted below 7.05, and especially below 7.0, due to the release of carbon dioxide from the carbonate into the medium. acidic. Therefore, the cosmetic composition and/or skin care composition comprising surface-reacted calcium carbonate has an improved acid resistance compared to prior art cosmetic products containing, for example, ground calcium carbonate that has not been reacted. on the surface as described above. This is particularly advantageous because cosmetic products and/or skin care products are typically formulated to have a preferred pH value of less than 7.5, or less than 7.0 for the purpose of approaching or equaling the skin's natural pH level. Without wishing to be bound by theory, the inventors hypothesize that surface treatment of calcium carbonate, as defined herein, results in a specific surface structure that exhibits improved acid resistance compared to calcium carbonate that is not reacted on the surface.

[00114] The cosmetic composition and/or skin care composition is, however, not limited to a pH value of < 7.5, and can also be adjusted to a pH value of < 8.5.

[00115] The cosmetic composition and/or skin care composition preferably has a pH value of < 8.5, preferably < 8.0, more preferably < 7.0 and most preferably 4.0 to 7 ,0. The cosmetic composition and/or skin care composition may further comprise water and/or at least one oil. Therefore, according to an embodiment of the present invention, the cosmetic composition and/or skin care composition further comprises water. According to another embodiment, the cosmetic composition and/or skin care composition further comprises at least one oil. According to a preferred embodiment, the cosmetic composition and/or skin care composition further comprises water and at least one oil. An “oil”, within the meaning of the present invention, is a liquid or solid compound containing silicon and/or hydrocarbon.

[00116] The water can be selected from tap water, distilled water, deionized water, and preferably deionized water.

[00117] The at least one oil can be selected from any oil that is suitable for use in cosmetic compositions and/or skin care compositions. Oils that are suitable for use in cosmetic compositions and/or skin care compositions are known to those skilled in the art and are described, for example, in Regulation EC No. 1223/2009 of the European Parliament and of the European Council of 30 November 2009, and must not form part of the list of prohibited substances described therein.

[00118] According to an embodiment of the present invention, the at least one oil is selected from the group consisting of vegetable oils and esters thereof, coconut alkanoic ester, plant extracts, animal fats, siloxanes, fatty acids and esters thereof , petrolatum, glycerides and pegylated derivatives thereof, and mixtures thereof.

[00119] For example, a suitable vegetable oil may be palm oil, soybean oil, rapeseed oil, sunflower seed oil, peanut oil, cottonseed oil, palm kernel oil, coconut oil, olive oil, jojoba oil, corn oil, jumbu oil, guava oil, vine seed oil, hazelnut oil, linseed oil, rice bran oil, safflower oil, sesame, açaí palm oil, soursop oil, tucumã oil, Brazil nut oil, Carapa oil, buriti oil, passion fruit oil or pracaxi oil.

[00120] Suitable plant extracts can be prepared, for example, from Castanea sativa, Prunus dulcis, Juglans regia L., Olea europaea, Helichrysum stoechas, Quercus robur, Glycyrrhiza glabra, Vitis vinifera, Crataegus monogyna Jacq, or Pinus pinaster.

[00121] Suitable animal fats can be obtained, for example, from tallow.

[00122] Suitable siloxanes are, for example, dimethicone, cetyldimethicone, dimethicone, cetearylmethicone, cyclopentasiloxane, cyclomethicone, stearyldimethicone, trimethylsilylmodimethicone, stearoxydimethicone, amodimethicone, beenoxydimethicone, dimethicone-copolyol, polysiloxane, laurylmethicone-copolyol or cetyldimethicone-co polyol.

[00123] Suitable fatty acids are, for example, palmitic acid, stearic acid, myristic acid, oleic acid, palmitoleic acid, linoleic acid, linolenic acid, capric acid, caprylic acid, arachidonic acid and esters thereof.

[00124] Suitable petrolatum can be any petrolatum with a refined grade approved for cosmetic use, and preferably has a melting point between 35°C and 70°C.

[00125] Suitable glycerides are, for example, monoglycerides, diglycerides, or triglycerides of palmitic acid, stearic acid, myristic acid, oleic acid, palmitoleic acid, linoleic acid, linolenic acid, capric acid, caprylic acid, and mixtures thereof.

[00126] In one embodiment, the at least one oil comprises, preferably consists of, an oil. Alternatively, the at least one oil comprises, preferably consists of, two or more oils. For example, the at least one oil comprises, preferably consists of, two or three oils. Preferably, the at least one oil comprises, preferably consists of, two or more oils.

[00127] It is recognized that the cosmetic composition and/or skin care composition may comprise water and/or at least one oil and quantities thereof depending on the cosmetic composition and/or skin care composition to be prepared. and/or the manufacturer's needs. According to one embodiment, water is present in an amount of 1 to 95% by weight, preferably 15 to 90% by weight, more preferably 25 to 80% by weight, even more preferably 35 to 75% by weight. , and most preferably 45 to 65% by weight, based on the total weight of the cosmetic composition and/or skin care composition. According to another embodiment, the at least one oil is present in an amount of 1 to 95% by weight, preferably 2 to 75% by weight, more preferably 5 to 55% by weight, even more preferably 7.5% by weight. to 35% by weight, and most preferably 10 to 20% by weight, based on the total weight of the cosmetic composition and/or skin care composition.

[00128] In case the cosmetic composition and/or skin care composition comprises water and at least one oil, the composition may be a water-based dispersion or an oil-based dispersion. Therefore, according to one embodiment, the cosmetic composition and/or skin care composition is a water-based dispersion. According to another embodiment, the composition is an oil-based dispersion. According to a preferred embodiment, the cosmetic composition and/or skin care composition is a water-based dispersion. A "water-based dispersion" within the meaning of the present invention refers to a composition in which the water forms a continuous phase and the oil a dispersed phase, that is, the oil is dispersed in the continuous aqueous phase. An "oil-based dispersion" within the meaning of the present invention refers to a composition in which the oil forms a continuous phase and the water forms a dispersed phase, that is, the water is dispersed in the continuous oil phase. According to yet another embodiment, water is present in an amount of 1 to 95% by weight, preferably 15 to 90% by weight, more preferably 25 to 80% by weight, even more preferably 35 to 75% by weight. weight, and most preferably 45 to 65% by weight, and the at least one oil is present in an amount of 1 to 95% by weight, preferably 2 to 75% by weight, more preferably 5 to 55% by weight, even more preferably from 7.5 to 35% by weight, and most preferably from 10 to 20% by weight, based on the total weight of the cosmetic composition and/or skin care composition.

[00129] As described above, the intraporous and interporous structure of surface-reacted calcium carbonate can make it a superior agent for distributing materials previously adsorbed and/or absorbed over time relative to common materials having similar specific surface areas. Therefore, generally, any agent that fits within the intraparticle and/or interparticle pores of the surface-reacted calcium carbonate is suitable for transport by the surface-reacted calcium carbonate according to the invention. Accordingly, it is possible for the cosmetic composition and/or skin care composition to comprise at least one active agent that is adsorbed onto or absorbed into the surface of the surface-reacted calcium carbonate. According to one embodiment of the present invention, the cosmetic composition and/or skin care composition comprises at least one active agent that is adsorbed onto or absorbed into the surface of the surface-reacted calcium carbonate.

[00130] The inventors have surprisingly found that a cosmetic composition and/or skin care composition comprising an active agent that is adsorbed on or absorbed into the surface of the surface-reacted calcium carbonate has advantageous effects for the user. For example, it has been found that an active agent such as an essential oil and/or perfume oil that is adsorbed onto or absorbed into the surface of surface-reacted calcium carbonate can positively influence the sensation of the user's skin during or after application. of the cosmetic composition and/or skin care composition by providing a fresh sensation or a particularly pleasant odor.

[00131] According to a preferred embodiment of the present invention, the at least one active agent is selected from pharmaceutically active agents, biologically active agents, vitamins, disinfecting agents, preservatives, flavoring agents, surfactants, oils, fragrances, essential oils such as limonene or mint oil, and mixture thereof, and preferably biologically active agents, perfumed oils and essential oils. Preferably, the at least one active agent is an essential oil. More preferably, the at least one active agent is peppermint oil. “Mint oil” within the meaning of the present invention is an oil that is obtained from wild M. arvensis and typically comprises a variety of different terpenoids and/or terpenes such as menthol, isomenthone, menthone, menthyl acetate, limonene, α- pinene and β-pinene. Menthol is usually the predominant component of peppermint oil.

[00132] The at least one active agent can be adsorbed on and/or absorbed into the surface of the calcium carbonate reacted on the surface in specific amounts. In accordance with one embodiment of the present invention, the amount of the at least one agent that is adsorbed onto or absorbed into the surface of the surface-reacted calcium carbonate is in the range of 0.1 to 99% by weight, based on the weight of the surface-reacted calcium carbonate is preferably in the range of 30 to 95% by weight, more preferably 50 to 90% by weight, and most preferably 70 to 85% by weight.

[00133] The cosmetic composition and/or skin care composition may also comprise other additives. Additives that are suitable for cosmetic compositions are known to the skilled person and are described, for example, in Regulation EC No. 1223/2009 of the European Parliament and of the European Council of 30 November 2009, and need not form part of the list of prohibited substances described therein. According to an embodiment of the present invention, the cosmetic composition and/or skin care composition further comprises at least one additive selected from the group consisting of whitening agents, thickeners, stabilizers, chelating agents, preserving agents, wetting agents, emulsifiers, emollients, fragrances, colorants, skin tanning compounds, antioxidants, minerals, pigments, UV-A and/or UV-B filter, and mixtures thereof.

[00134] For example, the emulsifier can be an initial emulsifier, more preferably an anionic or cationic emulsifier. The emulsifier can be of natural vegetable origin, for example, polyglycerol ester or synthetic. More preferably, the emulsifier may be selected from the group comprising PEG compounds, PEG-free emulsifier, silicone-based emulsifier, silicones, waxes and mixtures thereof. For example, the emulsifier may be selected from the group comprising PEG compounds such as PEG-8 myristate, PEG-30-glyceryl cocoate, PEG-800-glyceryl cocoate, PEG-15-soy amide/IPDI copolymer, PEG-40-sorbitan peroleate, PEG-150 stearate and mixture thereof, carbomer, carboxymethyl cellulose, ceresin (also known as mineral wax), diethanolamine (DEA), isopropyl stearate, isopropyl laurate, isopropyl palmitate, isopropyl oleate isopropyl, polysorbate 20, polysorbate 60, polysorbate 80, propylene glycol, sorbitan stearate, sorbitan laurate, sorbitan palmitate, sorbitan oleate, steareth-20, triethanolamine (TEA), beeswax, Candelilla wax, carnauba wax , cetearyl alcohol, wheat bran cetearyl glycosides, wheat straw cetearyl glycosides, decyl glycoside, jojoba, lecithin, vegetable glycerin, xanthan gum, coconut glycoside, coconut alcohol, arachidyl alcohol, behenyl alcohol, arachidyl glycoside, and mixture of the same.

[00135] The fragrance can be selected from a natural fragrance and/or a synthetic fragrance known to be suitable in cosmetic formulations.

[00136] The colorant can be selected from a natural colorant and/or a synthetic colorant, pigment or dye such as Fe2O3, ZnO, TiO2, mica, talc, bismuth oxychloride, and mixtures thereof.

[00137] According to one embodiment, the skin tanning compound is preferably dihydroxyacetone (DHA) and/or erythrulose. For example, the skin tanning compound may be dihydroxyacetone (DHA) or erythrulose. Alternatively, the skin tanning compound may be dihydroxyacetone (DHA) in combination with erythrulose.

[00138] According to one embodiment, the cosmetic composition and/or skin care composition further comprises at least one emollient. Examples of suitable emollients are isocetyl stearate, ethylhexyl stearate, octyldecyl stearate, isocetyl stearate, isopropyl isostearate, isostearyl isostearate, ethylhexyl hydroxystearate, ethylhexyl palmitate, isopropyl palmitate, di - neopentyl glycol heptanoate, ethylhexyl isononanoate, isononyl isononanoate, cetearyl isononanoate, cetearyl octanoate, diisopropyl adipate, dicapryl adipate, diisostearyl malate, decyl oleate, isodecyl oleate, decyl myristate diisopropyl, isostearyl neopentanoate, octyldodecyl neopentanoate, ethylhexyl cocoate, PEG-7-glyceryl cocoate, C12-15 alkyl benzoate, C16-17 alkyl benzoate, stearyl benzoate, isostearyl benzoate, ethylhexyl benzoate, octyldodecyl benzoate, cocoglyceride, coconut alkanes, cococaprylate/caprate, and mixtures thereof. For example, the cosmetic composition may further comprise a mixture of cocoglyceride, isononyl isononanoate, coconut alkanes and coco-caprylate/caprate as an emollient.

[00139] Additionally or alternatively, the cosmetic composition and/or skin care composition further comprises at least one thickener. Examples of thickeners suitable for water-based dispersion are silicate-based thickeners such as magnesium silicate, aluminum silicate and mixtures thereof, hydroxyethyl cellulose, cellulose, microcrystalline cellulose, xanthan gum or polyacrylamide. Examples of suitable thickener for an oil-based dispersion are selected from the group comprising silicate such as magnesium silicate, aluminum silicate, silica, dimethyl silicate, hydrophobic pyrolyzed silica, poly(acrylic acid), poly(acrylic acid) salts, derivatives poly(acrylic acid), PEG compounds such as PEG-8 myristate, PEG-30-glyceryl cocoate, PEG-80-glyceryl cocoate, PEG-15-soy amide/IPDI copolymer, PEG peroleate -40-sorbitan, PEG-150 stearate and mixture thereof, methylcellulose, ethylcellulose, propylcellulose, carboxymethylcellulose, xanthan gum, ammonium acryloyldimethyltaurate/VP copolymer and mixture thereof.

[00140] Additionally or alternatively, the cosmetic composition and/or skin care composition further comprises at least one preservative agent. Examples of suitable preservative agents are phenoxyethanol, ethylhexylglycerin, parabens such as methylparaben, ethylparaben, propylparaben, butylparaben, isobutylparaben and mixture thereof, benzoic acid, sodium benzoate, sorbic acid, potassium sorbate and mixture thereof, or plant extracts with a preservative function such as rosemary extracts. For example, said mixture may comprise phenoxyethanol, methylparaben and isobutylparaben.

[00141] Examples of suitable chelating agents are a polyphosphate, ethylenediamine-N,N,N',N'-tetraacetic acid (EDTA), pyridine-2,6-dicarboxylic acid (DPA), diethylenetriaminepentaacetic acid (DTPA ), N,N- bis(carboxymethyl)glycine (NTA), ammonium diethyldithiophosphate (DDPA), disodium ethylenediaminetetraacetate (Na2H2EDTA), calcium disodium ethylenediaminetetraacetate (CaNa2EDTA), citric acid and acid salts citrus, sodium gluconate, and mixture thereof.

[00142] Examples of suitable wetting agents are primary alcohols such as 1-ethanol, 1-propanol, 1-butanol, isobutanol, 1-pentanol, isoamyl alcohol, 2-methyl-1-butanol, 1-hexanol, 1-heptanol, 1- octanol, 1-nonanol, 1-decanol, 1-undecanol, 1-dodecanol, 1-tridecanol, 1-tetradecanol, 1-pentadecanol, cetyl alcohol, 1-heptadecanol, stearyl alcohol, 1-nonadecanol and mixture thereof, secondary alcohols such as isopropanol, 2-butanol, 2-pentanol, 2-hexanol, 2-heptanol and mixtures thereof, tertiary alcohols such as tert-butyl alcohol, tert-amyl alcohol, 2-methyl-2-pentanol, 2-methylhexan- 2-ol, 2-methylheptan-2-ol, 3-methyl-3-pentanol, 3-methyloctan-3-ol and mixture thereof, diols such as 1,2-diols or 1,3-diols, for example , 1,3-propandiol, urea, and mixture thereof.

[00143] Examples of suitable antioxidants are butylhydroxyanisole (BHA), butylhydroxytoluol (BHT), gallate, carotinoid, polyphenols such as resveratrol, flavonoid and mixture thereof, polyphenol derivatives, ascorbic acid and salts thereof, tocopherol and salts thereof, beta-carotene, ubiquinone, tocotrienol, dihydroquercetin, antioxidants of natural origin, and mixtures thereof.

[00144] Examples of suitable pigments are inorganic red pigments such as iron oxide, ferric hydroxide and iron titanate, inorganic brown pigments such as Y-iron oxide, inorganic yellow pigments such as iron oxide yellow and ocher yellow, inorganic black pigments such as iron oxide black and carbon black, inorganic purple pigments such as manganese violet and cobalt violet, inorganic green pigments such as chromium hydroxide, chromium oxide, cobalt oxide and cobalt titanate, inorganic blue pigments such as iron blue and blue - ultramarine, particulate powders such as particulate titanium oxide, particulate cerium oxide and particulate zinc oxide, lacquered tar dyes, lacquered natural dyes, and synthetic resin powders combining the aforementioned powders.

[00145] The whitening agent can be selected from one or more of a vitamin B3 compound or its derivative, for example, niacin, nicotinic acid or niacinamide or other well-known whitening agents, for example, adapalene, aloe extract, ammonium lactate, anethole derivatives, apple extract, arbutin, azelaic acid, kojic acid, bamboo extract, bearberry extract, Bletilla tuber, Bupleurum falcatum extract, pimpernel extract, butylhydroxyanisole, butylhydroxytoluene, citrate esters , Chuanxiong, Dang-Gui, deoxyarbutin, 1,3-diphenylpropane derivatives, 2,5-dihydroxybenzoic acid and its derivatives, 2-(4-acetoxyphenyl)-1,3-dithane, 2-(4-hydroxyphenyl)- 1,3-dithane, ellargic acid, escinol, ursol derivatives, Fadeout (Pentapharm), Fangfeng, fennel/fennel extract, Ganoderma extract, Gaoben, Gatuline Whitening (Gattlefosse), genistic acid and its derivatives, glabridin and its derivatives, glycopyranosyl-1-ascorbate, gluconic acid, glycolic acid, green tea extract, 4-hydroxy-5-methyl-3[2H]-furanone, hydroquinone, 4-hydroxyanisole and its derivatives, 4-hydroxybenzoic acid derivatives , hydroxycaprylic acid, inositol ascorbate, lemon extract, linoleic acid, magnesium ascorbyl phosphate, Melawhite (Pentapharm), Morus alba extract, mulberry root extract, 5-octanoylsalicylic acid, parsley extract, Phellinus linteus extract , pyrogallol derivatives, 2,4-resorcinol derivatives, 3,5-resorcinol derivatives, rose hip extract, salicylic acid, Song-Yi extract, 3,4,5-trihydroxybenzyl derivatives, tranexamic acid , vitamins such as vitamin B6, vitamin B12, vitamin C, vitamin A, dicarboxylic acids, resorcinol derivatives, plant extracts, namely Rubia and Symplocos, hydroxycarboxylic acids such as lactic acid and its salts e.g. sodium lactate, and mixture of the same. The vitamin B3 compound or its derivatives for example, niacin, nicotinic acid or niacinamide are the most preferred whitening agents, with niacinamide being most preferred. Niacinamide, when used, is preferably present in an amount in the range of 0.1 to 10% by weight, more preferably 0.2 to 5% by weight, based on the total weight of the cosmetic composition.

[00146] The minerals can be selected from any minerals suitable for use in a cosmetic composition and/or skin care composition. For example, the cosmetic composition and/or skin care composition may contain silicates such as talc, mica and/or kaolin.

[00147] The UV-A and/or UV-B filter can be selected from an inorganic UV filter and/or an organic UV filter. Suitable inorganic UV filters are, for example, selected from the group consisting of titanium dioxide, zinc oxide, iron oxide, hydroxyapatite, cerium oxide, calcium-doped cerium oxide, cerium phosphate, and mixtures thereof. Organic UV filters are, for example, selected from the group comprising cinnamic acid and its salts, derivatives of salicylic acid and its salts, benzophenones, derivatives of aminobenzoic acid and its salts, dibenzoylmethanes, derivatives of benzylidene camphor, derivatives of benzimidazole, derivatives of diphenyl acrylate, acrylamide derivatives, benzotriazole derivatives, triazine derivatives, benzalmalonate derivatives, aminobenzoate derivatives, octocrylene, and mixtures thereof.

[00148] It is recognized that the cosmetic composition may comprise at least one other additive and its quantity is dependent on the cosmetic composition to be prepared and/or the needs of the manufacturer. For example, the cosmetic composition may comprise 0.1 to 10% by weight of thickeners, stabilizers, chelating agents, whitening agents, wetting agents, emulsifiers, emollients, and/or skin tanning compounds, and/or 0.1 to 15 % by weight of preservative agents, fragrances, colorants, antioxidants, minerals, pigments, UV-A and/or UV-B filter, with the % by weight being based on the total weight of the cosmetic composition.

[00149] In one embodiment, the at least one additive comprises, preferably consists of, an additive. Alternatively, the at least one additive comprises, preferably consists of, two or more additives. For example, the at least one additive comprises, preferably consists of, ten to fifteen additives. Preferably, the at least one additive comprises, preferably consists of, two or more additives.

[00150] The cosmetic composition and/or skin care composition can be provided in the form of any cosmetic product and/or skin care product that is applicable to the skin of the face and/or body. According to an embodiment of the present invention, the cosmetic composition and/or skin care composition is selected from an eye makeup product, a lip care product, a hand care product, a for skin care, or a combination product thereof.

[00151] Furthermore, the cosmetic composition and/or skin care composition may have a certain Brookfield viscosity. For the purpose of the present invention, the term “viscosity” or “Brookfield viscosity” refers to Brookfield viscosity. Brookfield viscosity is, for this purpose, measured by a Brookfield viscometer (Type RVT) at 25°C ± 1°C at 100 rpm after 30 seconds using an appropriate axis and is specified in mPa^s. According to an embodiment of the present invention, the cosmetic composition and/or skin care composition has a Brookfield viscosity in a range of 4,000 to 50,000, preferably 10,000 to 45,000, more preferably 15,000 to 40,000, even more preferably 20,000 to 40,000, and most preferably 25,000 to 40,000 mPa^s at 25°C.

[00152] The use of surface-reacted calcium carbonate as a skin appearance modifier in a cosmetic composition and/or skin care composition may also modify the sensation of the user's skin during application or immediately after application. Therefore, according to one embodiment of the present invention, the calcium carbonate reacted on the surface further provides a modification of skin sensation.

[00153] The inventors have surprisingly found that a cosmetic composition and/or skin care composition comprising a surface-reacted calcium carbonate provides the user with an improved skin sensation during and/or after application. In particular, the cosmetic composition and/or skin care composition can be easily spread onto the skin and application provides the user with a soft, non-sticky and/or non-greasy skin sensation. Furthermore, the modification of skin sensation may be altered or further intensified in certain respects if a surface-reacted calcium carbonate is used, with at least one active agent being adsorbed onto and/or absorbed into the surface. of the calcium carbonate reacted on the surface. Therefore, by selecting a specific active agent, the change in skin sensation can be further influenced. For example, in the case of peppermint oil being adsorbed onto and/or absorbed into the surface of the surface-reacted calcium carbonate, the change in skin sensation may additionally refer to freshness and/or a pleasant odor.

[00154] According to one embodiment, the modification of skin sensation refers to reduced dry time, reduced greasiness, fluidity, spreadability, homogeneity, reduced stickiness, and/or resistance, and preferably reduced greasiness and/or improving spreadability.

[00155] According to another embodiment, the modification of skin sensation refers to a skin sensation, reduced dry time, reduced greasiness, fluidity, spreadability, odor, homogeneity, reduced stickiness, and/or resistance, and preferably reducing greasiness, improving spreadability, odor and/or freshness.

Preparation of the cosmetic composition and/or skin care composition

[00156] The method for preparing the cosmetic composition and/or skin care composition comprises at least providing a surface-reacted calcium carbonate as a skin appearance modifier. Surface-reacted calcium carbonate has a volumetric median particle size d50 of 0.1 to 90 μm and is a reaction product of ground natural calcium carbonate or calcium carbonate precipitated with carbon dioxide and one or more ion donors H3O+, where carbon dioxide is formed in situ by treatment with H3O+ ion donors and/or is supplied from an external source.

[00157] The surface-reacted calcium carbonate can be provided in any suitable liquid or dry form. For example, the surface-reacted calcium carbonate may be in the form of a powder and/or a suspension. The suspension can be obtained by mixing the surface-reacted calcium carbonate with a solvent, preferably water. The surface-reacted calcium carbonate to be mixed with a solvent, and preferably water, may be provided in any form, for example, as a suspension, slurry, dispersion, paste, powder, a wet filter cake or in a pressed form. or granulated, and preferably is provided as a powder.

[00158] The term “dispersion” or “suspension”, within the meaning of the present invention, refers to a system comprising a dispersing medium or solvent and at least one inorganic particulate material, with at least part of the particles of the at least an inorganic particulate material is present as insoluble solids or suspended particles in the dispersing medium or solvent.

[00159] The suspension may be dispersed or non-dispersed, that is, the suspension includes a dispersant, and therefore forms a dispersion, for example, an aqueous dispersion. Suitable dispersants are known in the art, and can be selected, for example, from polyelectrolytes, polyhydroxystearic acid, acetylacetone, propylamine, oleic acid, polyacrylates, dispersants based on carboxymethylcellulose, and mixtures thereof.

[00160] The solids content of the suspension, preferably the aqueous suspension, of surface-reacted calcium carbonate can be from 1 to 85% by weight, more preferably from 5 to 75% by weight, and most preferably from 10 to 40% by weight, based on total suspension weight.

[00161] In case the surface-reacted calcium carbonate is provided in dry form, the moisture content of the surface-reacted calcium carbonate may be between 0.01 and 5% by weight, based on the total weight of the calcium carbonate reacted on the surface. The moisture content of the surface-reacted calcium carbonate may be, for example, less than or equal to 1.0% by weight, based on the total weight of the surface-reacted calcium carbonate, preferably less than or equal to 0.5% by weight. % by weight, and more preferably less than or equal to 0.2% by weight. According to another example, the moisture content of the surface-reacted calcium carbonate may be between 0.01 and 0.15% by weight, preferably between 0.02 and 0.10% by weight, and more preferably between 0. 03 and 0.07% by weight, based on the total weight of the calcium carbonate reacted on the surface.

[00162] The method for preparing the cosmetic composition and/or skin care composition may further comprise providing water and/or at least one oil and mixing the water and/or the at least one oil with the calcium carbonate reacted on the surface.

[00163] Mixing the water and/or the at least one oil and the calcium carbonate reacted on the surface can be carried out in any manner known to the person skilled in the art. Mixing can be carried out under conventional mixing conditions. The skilled man will adapt these mixing conditions (such as mixing paddle configuration and mixing speed) according to his process equipment. It is recognized that any mixing method that would be suitable to form a cosmetic composition and/or skin care composition may be used.

[00164] If the method also includes the provision of water and at least one oil, mixing can be carried out in any order. Preferably, the water and the at least one oil are combined and mixed to form a mixture followed by the addition and mixing of the surface-reacted calcium carbonate.

[00165] Mixing can be carried out at temperatures typically used for preparing a cosmetic base formulation. Preferably, mixing is carried out at a temperature in the range of 15 to 100°C, more preferably 20 to 85°C or about 45°C.

[00166] The method for preparing the cosmetic composition and/or skin care composition may further comprise the provision of at least one additive. Combining and mixing the at least one additive and the surface-reacted calcium carbonate can also be carried out under conventional mixing conditions. The skilled man will adapt these mixing conditions (such as mixing paddle configuration and mixing speed) according to his process equipment. It is recognized that any mixing method that would be suitable to form a cosmetic composition and/or skin care composition may be used.

[00163] In case the method comprises the provision of surface-reacted calcium carbonate, water and/or at least one oil, and at least one additive, and preferably two or more additives, the combination and mixing can be carried out in any order.

[00167] For example, the method for preparing the cosmetic composition and/or skin care composition may comprise the steps of: a) providing a surface-reacted calcium carbonate as described herein, b) providing water, c) provide at least one oil, d) provide two or more additives, e) combine and mix one or more of the two or more additives with water to form a first mixture, f) combine and mix one or more of the two or more additives with the at least one oil to form a second mixture, g) combining and mixing the first mixture and the second mixture to form a third mixture, h) optionally combining and mixing the third mixture with one or more of the two or more additives, to form a fourth mixture, i) combine and mix the surface-reacted calcium carbonate with the third mixture from step g) or with the fourth mixture from step h).

[00168] The scope and interest of the invention will be better understood based on the following examples which are intended to illustrate certain embodiments of the present invention and are not limiting.

EXAMPLES 1. Measurement methods

[00169] The measurement methods implemented in the examples are described below.

Particle size distribution

[00170] The determined volumetric median particle size d50(vol) and the determined upper cutoff volumetric particle size d98(vol) were evaluated using a Malvern Mastersizer 2000 Laser Diffraction System (Malvern Instruments Plc., Great Britain). The value of d50(vol) or d98(vol) indicates a diameter value such that 50% or 98% by volume, respectively, of the particles have a diameter smaller than this value. The raw data obtained by the measurement was analyzed using Mie theory, with a particle refractive index of 1.57 and an absorption index of 0.005. The method and instrument are known to the skilled person and are commonly used to determine particle size distributions of fillers and pigments.

[00171] The determined weight median particle size d50(weight) was measured by the sedimentation method, which is an analysis of sedimentation behavior in a gravimetric field. The measurement was performed with a SedigraphTM 5120 from Micromeritics Instrument Corporation, USA. The method and instrument are known to the skilled person and are commonly used to determine particle size distributions of fillers and pigments. The measurement was carried out in an aqueous solution of 0.1 wt% Na4P2O7. Samples were dispersed using a high-speed shaker and supersonicated.

Specific surface area (ASE)

[00172] The specific surface area was measured via the BET method in accordance with ISO 9277 using nitrogen, after conditioning the sample by heating at 250°C for a period of 30 minutes. Before such measurements, the sample was filtered in a Büchner funnel, rinsed with deionized water and dried overnight at 90 to 100°C in an oven. Subsequently, the dried cake was completely ground in a mortar and the resulting powder was left positioned inside a moisture measuring scale at 130°C until a constant weight was reached.

Specific volume of intraparticle intruded pores (in cm3/g)

[00173] Specific pore volume was measured using a mercury intrusion porosimetry measurement using a Micromeritics Autopore V 9620 mercury porosimeter having a maximum applied mercury pressure of 414 MPa (60,000 psi), equivalent to a throat diameter Laplace measurement of 0.004 μm (~4 nm). The equilibrium time used in each pressure step was 20 seconds. The sample material was sealed in a 5 cm3 chamber dust penetrameter for analysis. Data were corrected for mercury compression, expansion in the penetrometer, and compression of sample material using the computer program Pore-Comp (Gane, P.A.C., Kettle, J.P., Matthews, G.P., and Ridgway, C.J., “Void Space Structure of Compressible Polymer Spheres and Consolidated Calcium Carbonate Paper-Coating Formulations”, Industrial and Engineering Chemistry Research, 35(5), 1996, p1753-1764.).

[00174] The total pore volume seen in the cumulative intrusion data can be separated into two regions with the intrusion data from 214 µm down to about 1-4 µm showing coarse packing of the sample between any strongly contributing agglomerated structures . Below these diameters is the fine interparticle packing of the particles themselves. If they are also intraparticle pores, then this region appears to be bimodal, and considering the specific volume of pores intruded by mercury into the pores thinner than the modal inflection point, that is, thinner than the point bimodal inflection, the specific intraparticle pore volume is defined. The sum of these three regions gives the overall total pore volume of the powder, but depends heavily on the compaction/sedimentation of the original powder sample at the coarse-pore end of the distribution.

[00175] Considering the first derivative of the cumulative intrusion curve, pore size distributions based on the equivalent Laplace diameter are described, inevitably including pore shielding. The differential curves clearly show the coarse agglomerated pore structure region, the interparticle pore region, and the intraparticle pore region, if present. Knowing the range of intraparticle pore diameters, it is possible to subtract the remaining volume of interparticle and intercluster pores from the total pore volume to give the desired pore volume of the internal pores alone in terms of the pore volume per unit mass (specific volume of pores). The same subtraction principle obviously applies for isolating any of the other pore size regions of interest.

Oil absorption

[00176] The oil absorption value was determined in accordance with ISO 787-5:1980.

Contrast card coating

[00177] The contrast cards are coated by using the respective coating compositions and applying them with a 50 μm aperture extender onto the surface of the contrast card. The contrast cards used are Leneta contrast cards, form 3-B-H, size 7-5/8 x 11-3/8 (194 mm x 289 mm), sold by the Leneta company, and distributed by Novamart, Stafa, Switzerland.

Determination of color values (Rx, Ry, Rz)

[00178] The color values Rx, Ry, Rz are determined over the white and black fields of the Leneta contrast card, and are measured with a Spectrafias SF 450 X spectrophotometer from the company Datacoior, Montreuii, France.

Contrast ratio (opacity) of the surface of a contrast coated card

[00179] Contrast ratio values are determined in accordance with ISO 2814 at a scattering rate of approximately 20 m2/i.

[00180] The contrast ratio is adjusted as described by the equation below: with Ryblack and Rywhite being obtained by measuring color values.

Skin shine and matting power measurements

[00181] A Skin-Giossymeter® GL200 probe (from the company Courage & Khazaka) was used to determine the matting power. Mode of operation: white light parallel to the head is sent at a 60 degree angle to the surface of the skin. Some of the light is directly reflected at the same angle (= angle of reflection) and some of the light is absorbed by the skin surface and then scattered and reflected diffusively. The Skin-Glossymeter® GL200 probe measures both the portion of directly reflected light, reflected from the surface, which is related to gloss, and the portion scattered from the surface.

2. Pigment materials Baby powder

[00182] Micro Talc FC CG AW was supplied by Mondo Minerals, and shows the characteristics listed in Table 1 below.

boron nitride

[00183] Boroneige® SF-3 was supplied by Merck KGaA, and shows the characteristics listed in Table 1 below.

Titanium dioxide

[00184] Titanium dioxide was supplied by Sigma-Aldrich, and shows the characteristics listed in Table 1 below.

Ground Calcium Carbonate (GCC)

[00185] GCC 1 is a high purity natural calcium carbonate obtained from marble, sold by Omya, and shows the characteristics listed in Table 1 below.

[00186] GCC 2 is a high purity natural calcium carbonate sold by Omya, and shows the characteristics listed in Table 1 below.

[00187] GCC 3 is a high purity natural calcium carbonate obtained from limestone, sold by Omya, and shows the characteristics listed in Table 1 below.

Surface reacted calcium carbonate SRCC 1

[00188] SRCC 1 had a d5o(vol) = 6.6 μm, d9s(vol) = 15.1 μm, an ASE = 144 m2/g with a specific intraparticle intruded pore volume of 0.811 cm3/g (for the pore diameter range of 0.004 to 0.23 μm).

[00189] SRCC 1 was obtained by preparing 450 liters of an aqueous suspension of ground calcium carbonate in a mixing vessel by adjusting the solids content of a ground marble calcium carbonate from Hustadmarmor, Norway, having a distribution of 90% mass median particle size less than 2 μm, as determined by sedimentation, so that a solids content of 16% by weight was obtained, based on the total weight of the aqueous suspension.

[00190] While the slurry was mixed, 47.1 kg of phosphoric acid was added in the form of an aqueous solution containing 30% by weight phosphoric acid to said suspension over a period of 15 minutes at a temperature of 70°C. After adding the acid, the slurry was stirred for an additional 15 minutes before removing it from the container and drying it.

SRCC 2

[00191] SRCC 2 had a d50(vol) = 4.5 μm, d98(vol) = 8.6 μm, an ASE = 96.1 m2/g with a specific intraparticle intruded pore volume of 1.588 cm3/g (for the pore diameter range of 0.004 to 0.4 μm).

[00192] In a mixing vessel, 10 liters of an aqueous suspension of ground limestone calcium carbonate was prepared by adjusting the solids content of a ground limestone calcium carbonate having a particle size distribution of 90% by weight. less than 2μm, based on the total weight of the ground calcium carbonate, so that a solids content of 15% by weight was obtained, based on the total weight of the aqueous suspension. [00188] While the slurry was being mixed, 2.8 kg of phosphoric acid was added in the form of an aqueous solution containing 30% by weight phosphoric acid to said suspension over a period of 10 minutes at a temperature of 70°C. Throughout the experiment, the suspension temperature was maintained at 70°C. After adding the acid, the suspension was stirred for an additional 5 minutes before removing it from the container and drying it.

SRCC 3

[00193] SRCC 3 has a d50 = 6.6 μm, a d98 = 13.7 μm, an ASE = 59.9 m2g-1 and a specific intraparticle intrusion pore volume of 0.939 cm3/g (for the range of pore diameters from 0.004 to 0.51 μm).

[00194] SRCC 3 was prepared as follows:

[00195] SRCC 3 was obtained by preparing 350 liters of an aqueous suspension of ground calcium carbonate in a mixing vessel by adjusting the solids content of a ground limestone calcium carbonate from Omya SAS, Orgon, having a size median particle mass of 1.3 μm, as determined by sedimentation, so that a solids content of 10% by weight was obtained, based on the total weight of the aqueous suspension.

[00196] While mixing the slurry at a speed of 6.2 m/s, 11.2 kg of phosphoric acid was added in the form of an aqueous solution containing 30% by weight phosphoric acid to said suspension over a period of 20 minutes at a temperature of 70°C. After adding the acid, the slurry was stirred for an additional 5 minutes before removing it from the container and drying it using a jet dryer.

SRCC 4

[00197] SRCC 4 has a d50 = 6.6 μm, d98 = 16.8 μm, an ASE = 25.1 m2/g and a specific intraparticle intruded pore volume of 0.37 cm3/g (for the range of pore diameters from 0.004 to 0.43 μm).

[00198] SRCC 4 was obtained by preparing 330 liters of an aqueous suspension of ground calcium carbonate in a mixing vessel by adjusting the solids content of a ground limestone calcium carbonate from Omya SAS, Orgon, having a size median particle mass of 3.0, as determined by sedimentation, so that a solids content of 14.5% by weight was obtained, based on the total weight of the aqueous suspension.

[00199] While mixing the slurry at a speed of 12.5 m/s, 7.9 kg of phosphoric acid was added in the form of an aqueous solution containing 30% by weight phosphoric acid to said suspension over a period of 10 minutes at a temperature of 70°C. After adding the acid, the slurry was stirred for an additional 5 minutes before removing it from the container and drying it using a jet dryer.

SRCC 5

[00200] SRCC 5 has a d50 = 1.6 μm, d98 = 10.0 μm, an ASE = 31.4 m2/g and a specific intraparticle intruded pore volume of 0.837 cm3/g (for the range of diameters of pore size 0.004 to 0.59 μm).

[00201] SRCC 5 was obtained by preparing 7 liters of an aqueous suspension of ground calcium carbonate in a mixing vessel by adjusting the solids content of a ground marble calcium carbonate from Omya Madencilik A.S., Turkey, having a median mass particle size of 0.4 μm, as determined by sedimentation, so that a solids content of 15% by weight was obtained, based on the total weight of the aqueous suspension.

[00202] While the slurry was mixed, 290 g of phosphoric acid was added in the form of an aqueous solution containing 10% by weight phosphoric acid to said suspension over a period of 100 minutes at a temperature of 70°C. After adding the acid, the slurry was stirred for an additional 5 minutes, before removing it from the container, filtering the product to remove excess water and then further drying in an oven.

SRCC 6

[00203] SRCC 6 has a d50 = 8.6 μm, d98 = 22.0 μm, an ASE = 96.1 m2/g and a specific intraparticle intruded pore volume of 1.73 cm3/g (for the range of pore diameters from 0.004 to 0.34 μm).

[00204] SRCC 6 was obtained by preparing 1,500 liters of an aqueous suspension of ground calcium carbonate in a mixing vessel by adjusting the solids content of a ground limestone calcium carbonate from Omya SAS, Orgon, having a size median particle mass of 0.6 μm, as determined by sedimentation, so that a solids content of 10.0% by weight was obtained, based on the total weight of the aqueous suspension.

[00205] While the slurry was rapidly mixed, 80 kg of phosphoric acid was added in the form of an aqueous solution containing 20% by weight phosphoric acid to said suspension over a period of 60 minutes at a temperature of 62°C. After adding the acid, the slurry was stirred for an additional 5 minutes before removing it from the container and drying it using a jet dryer. Table 1: Properties of the pigment materials used

3. Modification of skin appearance - Test results 3.1 Determination of the hiding power of the base composition

[00206] For the purpose of determining the hiding power (coverage) of a pigment material, base compositions were prepared comprising different concentrations of the pigment material, namely 5, 10 and 15% by weight. The covering power of the respective base compositions was determined by measuring the color values (Rx, Ry, Rz) and then calculating the contrast ratio, as described above. Table 2 shows the ingredients that were used to prepare a base composition and Table 3 shows the ingredients that were used to prepare a cosmetic composition and/or skin care composition. The INCI name of some ingredients will be used below. INCI refers to the International Nomenclature of Cosmetic Ingredients. Table 2: Ingredients for base composition Table 3: Ingredients for a cosmetic composition and/or skin care composition

[00207] The base composition contains the ingredients listed in Table 4. Table 4: Ingredients and quantities of the base composition

[00208] The base composition was prepared as follows: Demineralized water was added to a beaker, then Calgon, Bermocoll and sodium hydroxide solution were added under stirring with a Laboratory Dissolver until all ingredients were dissolved. Then the other ingredients listed in Table 2 through Byk 349 were added while continuously stirring the mixture. Then demineralized water was added and the resulting mixture was thoroughly mixed. Finally, Mowilith binding agent was added while continuously stirring the mixture at a speed of 100 rpm to obtain a final base composition. This base composition was used for the preparation of formulations with different pigment concentrations according to the formulas listed in Table 5:Table 5: Formulations with different pigment concentrations

[00209] The formulations were prepared by weighing the respective pigment material in the required amount and adding the respective amount of the base composition. Then the resulting mixtures were homogenized for 1 minute by using a high-speed mixer at a speed of 3,000 rpm. Then the mixture was mixed using a spatula and subsequently the mixture was homogenized again for 1 minute by using a high speed mixer at a speed of 3000 rpm. The resulting mixture was then used to measure the color values (Rx, Ry, Rz) which, in turn, were used to calculate the contrast ratio. Contrast ratio (coverage) values for pigment materials used at different pigment concentrations are listed in Table 6.Table 6: Coverage values for different pigment materials and for different pigment concentrations in a base composition

[00210] The above results clearly show that the surface-reacted calcium carbonates of the invention SRCC 1, SRCC 2, and SRCC 3, at pigment concentrations of 10 or 15%, have comparable or even better coverage values when compared to Boroneige ® SF-3 which is used in prior art cosmetic formulations for this purpose. SRCC 2 shows the best coverage. The coverage is even better than that of titanium dioxide.

3.2 Determination of hiding power in a 50/50 mixture of foundation composition and cosmetic composition and/or skin care compositions

[00211] For the purpose of determining the covering power of a 50/50 mixture of a base composition and a cosmetic composition and/or skin care composition, cosmetic compositions and/or skin care compositions were prepared of the skin with different pigment materials and also with different concentrations of pigment material. The specific amounts of ingredients of the different cosmetic compositions and/or skin care compositions are shown in Table 7 (general formulation of the cosmetic composition and/or skin care composition) and Table 8 which lists the different pigment materials and also their concentrations in each cosmetic composition and/or skin care composition.

[00212] The cosmetic compositions and/or skin care compositions were prepared according to the following scheme: • Under rapid mixing (Eurostar 20 High Speed Control, IKA, 1,000 rpm) disperse A2 into the water (A1) during 10 minutes, then add A3 and disperse for another 10 minutes, • Pour all Phase B ingredients and heat phases A and B separately to a maximum temperature of 70°C, • Mix phase C using a mixer or a three-cylinder mill (Ultra Turrax T25-D, IKA, 24,000 rpm). Add phase D to phase C when the oil absorption of the pigment material is below 50 g/100g. If the oil absorption of the pigment material is above 50 g/100g then it has to be added at a later stage of the procedure, • Under rapid mixing (Eurostar 20 High Speed Control, IKA, 3,000 rpm) add phase B to phase A, • Maintain rapid mixing and add phase C at a temperature of 40°C, • Add separately phase D (if not already added) and phase E at a temperature of 30°C, • Allow the resulting mixture to cool to room temperature. Table 7: Base formulation with type and quantity of ingredients Table 8: Amount X.00 and nature of the pigment material used in the respective cosmetic composition and/or skin care composition of Table 7

[00213] 50% by weight of the respective cosmetic composition and/or skin care composition was then mixed with 50% by weight of the base composition shown in Table 4. (SpeedMixer DAC 150.1 FVZ, Hauschild Engineering, 3,000 rpm ). The hiding power of the resulting 50/50 mixtures was determined by measuring the color values (Rx, Ry, Rz) followed by calculating the contrast ratio as described above. The results for the respective compositions are listed in Table 9. Table 9: Hiding power (%) and R(y) value measured for the respective 50/50 mixtures of base composition and cosmetic composition and/or makeup composition skin care

[00214] All 50/50 mixtures including the surface-reacted calico carbonates of the invention (1B, 2B, 3B, 14B and 15B) show better hiding power when compared to 50/50 mixtures containing other pigment materials, such as ground calcium carbonate, Boroneige and Micro Talc, in the same pigment concentration.

3.3 Matting power of the cosmetic composition and/or skin care composition

[00215] The formulations shown in Table 10 were tested: Table 10: Matting formulation with type and quantity of ingredients

Matting test results:

[00216] The results for the F01 formulation based on GCC 3 are shown in Table 11. Table 11: Results for the F01 formulation based on GCC 3

[00217] Under these study conditions, after 28 days of once-daily use, the F01 formulation based on GCC 3 maintained non-shiny skin, distinguished by a decrease in the shine rate of 8% on average. Less shiny skin was observed in 67% of subjects. The results for the F02 formulation based on SRCC 5 are shown in Table 12.Table 12: Results for the F02 formulation based on SRCC 5

[00216] Under these study conditions, after 28 days of once-daily use, the F02 formulation based on GCC 5 maintained non-shiny skin, distinguished by a significant decrease in the shine rate of 12% on average. Less shiny skin was observed in 91% of subjects. Therefore, it can be concluded from these results presented in Tables 11 and 12 that the formulation based on surface-reacted calcium carbonate provides a better matting effect than the formulation based on ground calcium carbonate.

3.4 Modification of skin sensation - Cosmetic composition and/or skin care composition comprising peppermint oil Cosmetic composition and/or skin care composition containing mint oil

[00218] Peppermint oil was loaded onto the surface of GCC 1 and SRCC 3 using a Lodige mixer. Depending on the weight percentage of the mint oil, both carbonates were used in an oil-in-water emulsion. High quantity of peppermint oil, exactly 83.2% by weight, based on the weight of the surface reacted calcium carbonate, was loaded onto SRCC 3. 1 and 2% by weight of the loaded SRCC 3, based on the weight of the composition for the skin care, were used to formulate the compositions. Since GCC 1 contains the lowest weight percentage of peppermint oil at 22.6% by weight, the weight percentage of the loaded GCC 1 was adjusted to 2% by weight based on the weight of the skin care composition. To compare the change in skin sensation between all samples, peppermint oil alone, i.e. not loaded in a calcium carbonate carrier, was added at a concentration of 0.45% by weight to the other emulsion, for the purpose of obtain the same final concentration of mint oil in all compositions. Additionally, skin sensation modification of a composition comprising SRCC 4 having a smaller surface area compared to SRCC 3 was evaluated using the primary test. The primary test included direct application of the loaded SRCCs to the skin, followed by a spreading and circulating movement of the material over the skin. All cosmetic compositions and/or skin care compositions were prepared as oil-in-water emulsions.

3.4.1 Sensory evaluation

[00219] Sensory evaluation of cosmetic composition and/or skin care composition is a specific method for applying a composition to the skin, with the purpose of analyzing the modification of skin sensation during and after application. To ensure comparability, the method follows a strict and identical procedure for each test step. To perform the test, an amount of the composition, approximately 0.075 mL, is applied to the hand or finger using a small spoon. The compositions were marked with a rating from 0 to 10, see also the explanation of sensory properties in Tables 13 to 17.Sensory properties Table 13: Appearance Table 14: Hand movement Table 15: Spread Table 16: After . one minute Table 17: After . two minutes The following compositions were used: Composition 1: 0.45% peppermint oil Composition 2: 2% SRCC 3 loaded with 83.2% by weight peppermint oil Composition 3: 1% SRCC 3 loaded with 83.2 % by weight of peppermint oil Composition 4: 2% GCC 1 loaded with 22.6% by weight of peppermint oil Composition 5: 1% SRCC 4 loaded with 58.0% by weight of peppermint oil

[00220] The results of the sensory evaluation for storage at room temperature are shown in Table 18. Table 18: Results of the sensory evaluation for storage at room temperature

Interpretation of results

[00221] Peppermint oil is currently used in cosmetic compositions as a fragrant component. The concentration used in prior art compositions is usually in the range of 0.25 to 1% by weight of mint oil, for example, in refreshing creams and lotions. This is comparable with composition 1. As can be concluded from the results of the sensory evaluation, a composition comprising a small amount of loaded SRCC 3 (1 or 2% by weight; see compositions 2 and 3) improves many parameters. For example, the opacity and whiteness of compositions comprising SRCC 3 are increased. Compositions comprising SRCC 3 show better freshness results during the first application. Furthermore, SRCC 3-based compositions are non-greasy and sticky during and/or after application. The change in skin sensation is long-lasting, that is, for two to five minutes, when the composition comprises SRCC 3. SRCC 3 is capable of distributing a cooling effect for a long time and a perception of pleasant sensation after application. . SRCC 3 has the ability to neutralize the odor of raw materials. It has the advantage of releasing the fragrance at the end after formulation. The results show that the sensation of freshness was more intense when the composition comprised SRCC 3, which indicates that the low proportion of SRCC 3 could have intensified the release of mint oil and its penetration into the skin, increasing the perception of freshness. . There were no significant differences in freshness intensity after 2 minutes of application between the compositions containing only mint oil or loaded GCC 1. The loaded SRCC 3 contributes to the immediate perception of freshness and is not only a skin sensation modifier, but also a carrier for oils. SRCC 3 has been shown to act on several different parameters of skin sensation. Compositions comprising SRCC 3 are easy to spread and feel pleasant during and/or after application. Compositions comprising SRCC 3 reduce dryness, enhance the matting effect, and show the ability to remove lines and wrinkles, that is, the skin appears blemish-free. SRCC 4 was loaded with 58 wt% peppermint oil, based on the total weight of the SRCC. To compare its performance, the same amount, i.e., 58% by weight of peppermint oil, was loaded onto SRCC 3. SRCC 4 has a smaller surface area. It was selected to evaluate the sensation characteristics of the skin and to determine how much oil can be loaded onto the surface-reacted calcium carbonate. The primary test described above was performed. The feeling of freshness was additionally intensified for the loaded SRCC 4 compared to the loaded SRCC 3. This could be due to a smaller surface area and/or a smaller surface porosity of SRCC 4. This could, in turn, result in a smaller amount of peppermint oil being adsorbed and/or absorbed onto SRCC 4. Peppermint oil it would be more exposed to the surface of the skin, and that could be the reason why the freshness rating is rated higher. The use of loaded SRCC 4 guarantees a long-lasting change in skin sensation, that is, for two to five minutes. The charged SRCC 3 also provides a good duration of freshness over a long period of time, but the period of time is shorter than with the charged SRCC 4. Lubricity, smoothness and spreadability are slightly better for SRCC 4. SRCC 4 is easier to spread and gentle on the skin. Loading peppermint oil onto the surface of SRCC 4 demonstrated that skin sensation, especially the sensation of freshness, can be improved and intensified using an SRCC having a smaller surface area.

3.5 Modification of skin sensation - Cosmetic composition and/or skin care composition in the form of a lipstick

[00222] The performances of ground calcium carbonate (GCC) and surface-reacted calcium carbonate (SRCC) were compared. Lipsticks were prepared with the ingredients shown in Table 19. The amount of GCC or SRCC, respectively, is indicated below. Table 19: Lipstick formulation with type and amount of ingredients • Phase A is heated to 80°C in a glass beaker until homogeneous, • Add the phase B components to phase A while gently stirring. Homogenize the mixture (Ultra Turrax T25-D, IKA, 24,000 rpm), • Then pour the liquid mixture into appropriate molds and leave the molds in the refrigerator overnight, • Leave the molds at room temperature and wait 1 hour. Remove the lipstick from the molds.

[00223] The following amounts of GCC 2 or SRCC 2 were used for the compositions as described in Table 19: Composition 1: 2% by weight of SRCC 2 Composition 2: 5% by weight of GCC 2 Composition 3: 10% by weight weight of GCC 2 Composition 4: unfilled (i.e. 20% by weight almond oil) Composition 5: 1% by weight SRCC 2

[00224] Sensory evaluation was carried out according to the criteria shown in Tables 20 to 22. Table 20: Appearance Table 21: Hand movement (over hand) Table 22: Spread (over the lip)

[00225] The results of the sensory evaluation are shown in Table 23. Table 24 shows the results of the color evaluation. Table 23: Results of the sensory evaluation Table 24: Color evaluation results

Interpretation of results

[00226] When the concentration of powders is very high, for example, above 10% by weight, the lipstick shows some defects such as bubbles, cracks or streaks. The homogeneity assessment seems to be better in the presence of minerals but it depends on the concentration used. More precisely, homogeneity is good for concentrations in the range of 2 to 10% by weight. The hardness of the lipstick correlates with the weight percentage of calcium carbonate present in the lipstick composition. The higher the concentration of calcium carbonate in the composition, the higher the hardness of the prepared lipstick. All lipsticks provide better homogeneity during application compared to the reference, which does not contain GCC or SRCC. The best homogeneity is provided by compositions 1 and 5 comprising SRCC 2. Furthermore, composition 5 comprising 1% by weight of SRCC 2 provides good lubricity. The addition of SRCC to a composition additionally allows coverage to be improved. SRCC 2 provides a darker color compared to the reference. Uniformity is increased for compositions 1 and 5 comprising SRCC 2.

Claims (15)

1. Use of a surface-reacted calcium carbonate having a volumetric median particle size d50 of 0.1 to 90 μm as a skin appearance modifier in a cosmetic composition and/or skin care composition, characterized by the fact that the calcium carbonate reacted on the surface is a reaction product of ground natural calcium carbonate or calcium carbonate precipitated with carbon dioxide and one or more H3O+ ion donors, with the carbon dioxide being formed in situ by the treatment with H3O+ ion donors and/or is provided from an external source, and wherein the skin appearance modifier is a covering agent, a matting agent and/or a skin color modifier. 2. Use according to claim 1, characterized in that the surface-reacted calcium carbonate has a volumetric median particle size d50 of 0.5 to 50 μm, preferably of 1 to 40 μm, more preferably of 1. 2 to 30 μm, and most preferably 1.5 to 15 μm. 3. Use according to claim 1 or 2, characterized in that the surface-reacted calcium carbonate has a specific surface area of 15 m2/g to 200 m2/g, preferably of 20 m2/g to 180 m2/g, and more preferably from 25 m2/g to 160 m2/g, measured using nitrogen and BET method. 4. Use according to any one of claims 1 to 3, characterized in that the ground natural calcium carbonate is selected from the group consisting of marble, chalk, limestone, and mixtures thereof, or the precipitated calcium carbonate is selected of the group consisting of precipitated calcium carbonates having an aragonitic, vateritic or calcitic crystalline form, and mixtures thereof. 5. Use according to any one of claims 1 to 4, characterized in that the at least one H3O+ ion donor is selected from the group consisting of hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, citric acid, oxalic acid , an acidic salt, acetic acid, formic acid, and mixture thereof, preferably the at least one H3O+ ion donor is selected from the group consisting of hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, oxalic acid, H2PO4-, being at least partially neutralized by a cation selected from Li+, Na+ and/or K+, HPO42-, being at least partially neutralized by a cation selected from Li+, Na+, K+, Mg2+, and/or Ca2+, and mixture thereof, more preferably the at least one H3O+ ion donor is selected from the group consisting of hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, oxalic acid, or mixtures thereof, and most preferably, the at least one H3O+ ion donor is acidic phosphoric. 6. Use according to any one of claims 1 to 5, characterized in that the skin appearance modifier is a covering agent and/or a matting agent. 7. Use according to any one of claims 1 to 6, characterized in that the cosmetic composition and/or skin care composition has a pH value of < 8.5, preferably < 8.0, preferably < 7.0 and with maximum preference from 4.0 to 7.0. 8. Use according to any one of claims 1 to 7, characterized in that the surface-reacted calcium carbonate is present in the cosmetic composition and/or skin care composition in an amount of 0.1 to 50% by weight, based on the total weight of the composition, preferably from 0.5 to 20% by weight, more preferably from 1 to 10% by weight, and most preferably from 3 to 10% by weight. 9. Use according to any one of claims 1 to 8, characterized in that the cosmetic composition and/or skin care composition further comprises water and/or at least one oil, preferably at least one oil is selected from the group consisting of vegetable oils and esters thereof, coconut alkanoic ester, plant extracts, animal fats, siloxanes, silicones, fatty acids and esters thereof, petrolatum, glycerides and pegylated derivatives thereof, and mixtures thereof. 10. Use according to any one of claims 1 to 9, characterized in that the cosmetic composition and/or skin care composition comprises at least one active agent that is adsorbed on or absorbed into the surface of the carbonate carbonate. calcium reacted on the surface. 11. Use according to claim 10, characterized in that the at least one active agent is selected from pharmaceutically active agents, biologically active agents, vitamins, disinfecting agents, preservatives, flavoring agents, surfactants, oils, fragrances, essential oils , and mixture thereof. 12. Use according to any one of claims 1 to 11, characterized in that the composition further comprises at least one additive selected from the group consisting of bleaching agents, thickeners, stabilizers, chelating agents, preservative agents, wetting agents, emulsifiers, emollients, fragrances, colorants, skin tanning compounds, antioxidants, minerals, pigments, UV-A and/or UV-B filter, and mixtures thereof. 13. Use according to any one of claims 1 to 12, characterized in that the cosmetic composition and/or skin care composition is selected from an eye makeup product, a lip care product, a hand care product, a skin care product, or a combination product thereof. 14. Use according to any one of claims 1 to 13, characterized in that the cosmetic composition and/or skin care composition has a Brookfield viscosity in a range of 4,000 to 50,000, preferably 10,000 to 45,000, more preferably 15,000 to 40,000, even more preferably 20,000 to 40,000, and most preferably 25,000 to 40,000 mPa^s at 25°C. 15. Use according to any one of claims 1 to 14, characterized by the fact that the calcium carbonate reacted on the surface also provides a change in skin sensation.